Note: Descriptions are shown in the official language in which they were submitted.
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DUAL FLUSH HANDLE CONTROL
CROSS REFERENCE TO RELATED APPLICATIONS
[0001]
This application claims priority to co-pending U.S. provisional application
entitled "DUAL FLUSH HANDLE CONTROL" having serial no. 61/610,897, filed
March 14, 2012, the entirety of which is hereby incorporated by reference.
This
application is also a continuation-in-part of co-pending U.S. patent
application
entitled "DUAL FLUSH HANDLE CONTROL" having serial no. 13/302,924, filed
November 22, 2011, the entirety of which is hereby incorporated by reference.
BACKGROUND
[0001] Most dual flush toilet systems are provided as a package including a
dual flush assembly and activation device to initiate operation of the dual
flush
assembly in one of the dual flush modes. In many instances, the activation
control
may not be preferred by the customer.
BRIEF DESCRIPTION OF THE DRAWINGS
[0002] Many aspects of the present disclosure can be better understood with
reference to the following drawings. The components in the drawings are not
necessarily to scale, emphasis instead being placed upon clearly illustrating
the
principles of the disclosure. Moreover, in the drawings, like reference
numerals
designate corresponding parts throughout the several views.
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[0003] FIG. 1 is a drawing of a dual flush toilet system with rotational
activation
of a dual flush assembly in accordance with various embodiments of the
disclosure.
[0004] FIGS. 2A-2C are drawings of an example of a dual-input activation
assembly for use in the dual flush toilet system of FIG. 1 in accordance with
various
embodiments of the disclosure.
[0005] FIGS. 3A-3D are drawings that provide various views of an example of a
dual flush handle assembly that can be utilized in the activation assembly of
FIGS.
2A-2C in accordance with various embodiments of the disclosure.
[0006] FIGS. 4A-4C are drawings that provide various views of the dual flush
handle assembly of FIGS. 3A-3D in a neutral position in accordance with
various
embodiments of the disclosure.
[0007] FIGS. 5A-5C are drawings that provide various views of the dual flush
handle assembly of FIGS. 3A-3D in a position configured to initiate a partial
flush in
a toilet in accordance with various embodiments of the disclosure.
[0008] FIGS. 6A-6C are drawings that provide various views of the dual flush
handle assembly of FIGS. 3A-3D in a position configured to initiate a full
flush in a
toilet in accordance with various embodiments of the disclosure.
[0009] FIGS. 7A-7F, 8A-8C, 9A-9C, 10A-10B, 11A-11E, 12A-12E, 13A-13F,
and 14A-14D are drawings that provide various views of examples of dual flush
handle assemblies that can be utilized in the activation assembly of FIGS. 2A-
2C in
accordance with various embodiments of the disclosure.
DETAILED DESCRIPTION
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[00101 With reference to FIG. 1, shown is a dual flush toilet system 100
including a dual flush assembly 103 and an activation assembly 106 to initiate
operation of the dual flush assembly 103 in one of the dual flush modes: quick
flush
for liquids and full flush for solids. In the embodiment of FIG. 1, the
activation
assembly 106 includes a rotary handle assembly 109 that is detachably
connected
to an actuation control box 113. The exemplary actuation control box 113 is in
communication with the dual flush assembly 103 through a cable assembly 116,
which is connected to the actuation control box 113 and the body of the dual
flush
assembly 103. The rotary handle assembly 109 is detachably connected to
actuation control box 113. For example, the rotary handle assembly 109 may be
engaged with the actuation control box 113 by a spring-loaded clip assembly.
By
actuating the clip assembly, the rotary handle assembly 109 may be detached
from
the actuation control box 113.
[0011] Operation of an example of an activation assembly 106 is discussed with
reference next to FIGS. 2A-2C. FIG. 2A illustrates the activation assembly 106
in a
neutral position. When the actuation control box 113 is in a neutral position,
the
handle lever 233 is in a neutral position. In the embodiment of FIG. 2A, the
handle
lever 233 is in a horizontal position. In the neutral position, the cable 229
is
retracted in cable assembly 116 and the cable anchor 223 is at a neutral
position in
the linear guide path 226.
[0012] A rotational force provided through a stem of the handle lever 233 is
transferred through a cam to the cable anchor 223 in the linear guide path 226
by
an anchor arm 206. The anchor arm 206 may be configured to exert an initial
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breakaway force on the cable anchor 223, followed by a reduced translation
force.
In one embodiment, the higher breakaway force is exerted at a breakaway point
of
the anchor arm 206 on a breakaway shoulder of the cable anchor 223. As the
cable anchor 223 moves along the linear guide path 226, the cam rotates about
the
rotational axis until the anchor arm 206 engages a translation pin 216 at a
second
position on the anchor arm 206.
[0013] Further rotation of the cam 229 exerts a reduced translation force on
the
cable anchor 223 though the translation pin 216 because of an increased lever
arm
length. Anchor arm 206 disengages with the breakaway shoulder, removing the
breakaway force from the cable anchor 223. Counter clockwise rotation of the
handle lever 233 is illustrated in FIGS. 2B and 2C. Depressing handle button
236
before rotating handle lever 233 restricts the rotation of the activation
control
assembly 103, to the intermediate quick flush position as illustrated in FIG.
5E.
Rotating the handle lever 233 without depressing the handle button 236
initiates a
full flush of the dual flush assembly 103 by allowing the handle lever 233 to
be
rotated in a counter clockwise direction beyond the quick flush restriction
point.
FIG. 2C illustrates the handle lever 233 rotated to the full flush position.
[0014] Referring next to FIGS. 3A-3D, shown is one example of a dual flush
handle assembly 600 according to various embodiments of the present
disclosure.
The dual flush handle assembly 600 may be used to initiate a partial flush
and/or a
full flush of a toilet. To this end, the dual flush handle assembly 600 may be
in
communication with, for example, the actuation control box 113 (FIG. 1), the
activation assembly 106 (FIG. 1), or other dual flush activation control
mechanisms.
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As further non-limiting examples, the dual flush handle assembly 600 may be
used
with various embodiments disclosed in co-pending U.S. Patent Application
entitled
"Dual Flush Activation" filed on January 7, 2011 and assigned application
number
12/986,729, which is incorporated by reference herein in its entirety.
[0015] FIGS. 3A-3B show exploded views of one embodiment, among others,
of the dual flush handle assembly 600. The dual flush handle assembly 600
includes a first handle lever 603, a second handle lever 606, a bushing 609, a
damper 613, a first spring 616, a second spring 619, a first retaining element
623, a
second retaining element 626, and possibly other components not discussed in
detail herein.
[0016] The first handle lever 603 is shaped to be nested within the second
handle lever 606. In this sense, the first handle lever 603 and second handle
lever
606 are formed to facilitate at least a portion of the first handle lever 603
"fitting"
within a portion of the second handle lever 606. The second handle lever 606
may
fit within a profile of the first handle so as to promote the appearance of a
single
handle. Accordingly, the dual flush handle assembly 600 may present an
appearance of a conventional toilet flush lever, while providing the
functionality of a
dual flush handle control.
[0017] As will later be described, the first handle lever 603 and second
handle
lever 606 may be configured to rotate co-axially about a common axis in order
to
initiate a partial flush and/or a full flush of a toilet. The first handle
lever 603 may
be limited in rotation by a certain amount. The second handle lever 606 may be
limited in rotation by an amount that differs from the rotation of the first
handle lever
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603. In this sense, the rotation of the first handle lever 603 and rotation of
the
second handle lever 606 may overlap at least partially. Further, it is
emphasized
that initiating a partial flush or a full flush may be caused by rotating the
first handle
lever 603 or second handle lever 606, respectively, in the same direction of
rotation.
[0018] The first handle lever 603 is configured to rotate about an axis by a
predetermined angle of rotation. To this end, the first handle lever 603
includes a
projection 629 and post 633, both extending from a toilet-facing surface of
the first
handle lever 603. In various embodiments, the projection 629 may comprise
tabs,
pins, knobs, detents, or other types of projections. The post 633 includes a
post
groove 636 to facilitate retaining the first handle lever 603 to the dual
flush handle
assembly 600 as will be later described. The first handle lever 603 may also
include one or more indicators 639 to denote to a user that the function of
the first
handle lever 603 is to initiate a partial flush of a toilet.
[0019] The second handle lever 606 is also configured to rotate about an axis
by a predetermined angle of rotation. It is emphasized that the second handle
lever
606 may rotate by a predetermined angle of rotation that is different than the
angle
of rotation of the first handle lever 603. The second handle lever 606
includes a
slot 643, a stem 646, one or more indicators 639, and possibly other features
not
discussed in detail herein.
[0020] As best shown in FIGS. 3B and 3C, the slot 643 is disposed in a wall of
the second handle lever 606 and is configured to receive the projection 629.
The
stem 646 extends from both the outward and toilet-facing surfaces of the
second
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handle lever 606. In alternative embodiments, the stem 646 may extend from
only
one of the outward or toilet-facing surfaces of the second handle lever 606.
[0021] The stem 646 includes a bore 649 extending from the outward end of
the stem 646. The bore 649 is configured to receive the post 633 of the first
handle
lever 603. Although the stem 646 shown in FIGS. 3A-3D is configured to receive
the post 633, the post 633 in alternative embodiments may be configured to
receive
the stem 646.
[0022] The portion of the stem 646 extending from the interior end of the
second handle lever 606 includes a stem slot 653 configured to accommodate the
first retaining element 623. At the distal end of the interior portion of the
stem 646
is a stem groove 656. The stem groove 656 is configured to receive the second
retaining element 626 and facilitates securing the second handle lever 606 to
the
bushing 609. The distal end of the stem 646 can be configured to detachably
engage a cam of the actuation control box 113 (FIGS. 2A-2C). The distal end of
the bushing 609 may also be configured to detachably connect to the actuation
control box 113 (FIG. 1). For example, the end of the bushing 609 can engage
with
the actuation control box 113 by a spring-loaded clip assembly.
[0023] The bushing 609 is configured to extend through an opening in a wall of
a toilet tank. The bushing 609 includes a passage 659, a stop 663, a lip 665,
a
rectangular segment 666, a threaded segment 669, and possibly other features
not
discussed in detail herein.
[0024] The passage 659 extends longitudinally through the bushing 609 and is
configured for the stem 646 of the second handle lever 606 to pass at least
partially
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through the bushing 609. The stop 663 extends from the bushing 609 and is
configured to extend through the slot 643 of the second handle lever 606 and
to
abut the projection 629 of the first handle lever 603 as will be later
described.
[0025] The lip 665 of the bushing 609 is configured to abut an exterior
surface
of a toilet tank. The rectangular segment 666 is configured to be secured in a
rectangular opening in the toilet tank wall, thereby preventing rotational
movement
of the bushing 609 with respect to the toilet tank wall. The threaded segment
669
of the bushing 609 is configured to receive an appropriately threaded nut that
abuts
an interior surface of the toilet tank wall, thereby preventing translational
movement
of the bushing 609 with respect to the toilet tank.
[0026] The damper 613 may be disposed between the first handle lever 603
and second handle lever 606. In the embodiment shown in FIGS. 3A-3D, the
damper 613 is attached to the first handle lever 603. However, in alternative
embodiments, the damper 613 may be attached to the second handle lever 606.
Best shown in FIG. 3B, the damper includes a lip 676 to facilitate retaining
the
damper 613 in an appropriate aperture of the first handle lever 603. In
alternative
embodiments, the damper 613 may be attached using, for example, an adhesive or
other attachment mechanism.
[0027] The damper 613 may be formed of various cushioning materials, such
as rubber, nylon, foam, or other materials. By being disposed between the
first
handle lever 603 and second handle lever 606, the damper 613 may prevent or
reduce sound caused by the first handle lever 603 abruptly contacting the
second
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handle lever 606. Additionally, the damper 613 may provide a cushioned
sensation
when using dual flush handle assembly 600.
[0028] The first spring 616 may be configured to provide a bias force that
retains the first handle lever 603 towards the second handle lever 606 when in
a
neutral position. To this end, the first spring 616 may be disposed between
the first
handle lever 603 and second handle lever 606, with the first spring 616 being
around the post 633. The ends of the first spring 616 may be retained, for
example, in appropriate openings in the first handle lever 603 and/or second
handle
lever 606 as is appreciated.
[0029] In other embodiments, the function of the first spring 616 may be
incorporated into the damper 613. To this end, the damper 613 may be formed of
a
spring-like material and attached to the first handle lever 603 and second
handle
lever 606.
[0030] The second spring 619 is configured to provide a bias force that
facilitates returning the second handle lever 606 and/or first handle lever
603 to a
neutral position after initiating a flush. To this end, the second spring 619
may be
disposed between the second handle lever 606 and bushing 609, with the second
spring 619 being around the stem 646 of the second handle lever 606. The ends
of
the second spring 619 may be retained, for example, in appropriate holes in
the
second handle lever 606 and/or bushing 609.
[0031] The second spring 619 may also facilitate installation of the dual
flush
handle assembly 600. In this sense, the second spring 619 may bias the first
handle lever 603 and second handle lever 606 to be in an approximately
horizontal
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position when the bushing 609 is inserted into an opening in the toilet tank
wall and
prevented from rotating with respect to the tank wall. In other words, with
the
bushing 609 inserted into the tank wall and fixed from rotating, the second
spring
619 may facilitate the first handle lever 603 and second handle lever 606
being
biased in an approximately horizontal position.
[0032] Although the first spring 616 and second spring 619 are shown as being
coil springs, other types of springs may be used in accordance with the
present
disclosure. For example, flat springs, leaf spring, rubber bands, or any other
type
of spring element may be used. Further, it is understood that a first spring
616
and/or second spring 619 may be omitted in various embodiments.
[0033] The first retaining element 623 is configured to retain the post 633
within
the stem 646. To this end, the first retaining element 623 may insert at least
partially into the stem slot 653 and clip to the post groove 636. Thus, the
first
retaining element 623 may retain the first handle lever 603 to the second
handle
lever 606 in a lateral position, while facilitating rotation of the first
handle lever 603
with respect to the second handle lever 606.
[0034] In a similar fashion, the second retaining element 626 is configured to
retain the stem 646 within the bushing 609. To this end, with the stem groove
656
extending through the passage 659 of the bushing 609, the second retaining
element 626 may clip to the stem groove 656. Thus, the second retaining
element
626 may retain the second handle lever 606 to the bushing 609 in a lateral
position,
while facilitating rotation of the second handle lever 606 and/or first handle
lever
603 with respect to the bushing 609.
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[0035] It is understood that other methods of retaining the first handle lever
603,
second handle lever 606, and bushing 609 may be used. For example, instead of
the stem 646 extending from the second handle lever 606, the stem 646 may
extend from the bushing 609. In such a case, the second handle lever 606
and/or
first handle lever 603 may include appropriate mechanisms for attachment as
can
be appreciated.
[0036] In addition, it is understood that other mechanisms of restricting the
rotation of the first handle lever 603 and/or second handle lever 606 may be
used.
For example, although embodiment of FIGS. 3A-3D shows the first handle lever
603 comprising the projection 629 and the second handle lever 606 comprising
the
slot 643, the second handle lever 606 may comprise a projection 629 in various
alternative embodiments. Additionally, the projection 629 may extend from the
bushing 609 in various other embodiments. Even further, the first handle lever
603
and/or bushing 609 may comprise the slot 643.
[0037] Next, a description of the general operation of the dual flush handle
assembly 600 is provided. FIGS. 4A-4C, 5A-5C, and 6A-6C show progressions of
the dual flush handle assembly 600 being in a neutral position, initiating a
partial
flush (i.e., "quick flush"), and initiating a full flush, respectively.
[0038] With reference to FIGS. 4A-4C, shown is the dual flush handle assembly
600 in a neutral position according to various embodiments of the present
disclosure. The neutral position shown is the position to which the dual flush
handle assembly 600 returns after a flush has been initiated. As shown in
FIGS.
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4B and 4C, the reference line A denotes the position at which a portion of the
first
handle lever 603 and second handle lever 606 rest while in the neutral
position.
[0039] As shown in FIGS. 4A-4C, the projection 629 of the first handle lever
603
(FIGS. 3A-3D) is positioned within the slot 643 of the second handle lever
606.
Also, the stop 663 of the bushing 609 is positioned within the slot 643 of the
second
handle lever 606. As best shown in FIGS. 4B and 4C, there is a space 693
between the stop 663 and the projection 629. Further, there is a space 696
between the projection 629 and an edge of the slot 643. Additionally, the stop
663
of the bushing 609 is engaged with the opposite edge of the slot 643.
[0040] Turning now to FIGS. 5A-5C, shown is the dual flush handle assembly
600 in a position configured to initiate a partial flush of a toilet. The dual
flush
handle assembly 600 may arrive in this position, for example, by a user
pressing on
the first handle lever 603. Rotating the first handle lever 603 pushes against
the
second handle lever 606 causing the second handle lever 606, and thus the stem
646, to rotate as well. The rotation of the first handle lever 603 is limited
by the
projection 629 of the first handle lever 603 making contact with the stop 663
of the
bushing 609. By rotating the first handle lever 603 by the predetermined
amount,
the stem 646 rotates to initiate a partial flush, for example, through the
actuation
control box 113 (FIG. 1) as described above.
[0041] As shown in FIGS. 5B and 5C, the angle a denotes the angle of rotation
that the first handle lever 603 and second handle lever 606 have rotated from
the
neutral position (denoted by reference line A) to the position for initiating
a partial
flush (denoted by reference line B). By rotating by the angle a, the stop 663
now
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abuts the projection 629 of the first handle lever 603. Thus, the angle of
rotation a
is limited by the projection 629 engaging the stop 663. With the projection
629
engaging the stop 663, there is a space 699 between the stop 663 and an edge
of
the slot 643. Additionally, the space 696 between the projection 629 and
opposite
end of the slot 643 still exists.
[0042] After a partial flush has been initiated, the dual flush handle
assembly
600 may automatically return to the neutral position shown in FIGS. 4A-4C. To
this,
end, the second spring 619 or any other mechanism may cause the dual flush
handle assembly 600 to return to the neutral position.
[0043] Turning to FIGS. 6A-6C, shown is the dual flush handle assembly 600 in
a position configured to initiate a full flush of a toilet. The dual flush
handle
assembly 600 may arrive in this position, for example, by a user pressing the
second handle lever 606. By pressing on the second handle lever 606, the first
spring 616 (FIGS. 3A-3D) cause the first handle lever 603 to rotate in
conjunction
with the second handle lever 606 by angle a until the projection 629 of the
first
handle lever 603 contacts the stop 663 of the bushing 609. While the first
handle
lever 603 stops rotating at angle a, the second handle lever 606 may continue
to
rotate until the edge of the slot 643 of the second handle lever 606 contacts
the tab
of the first handle lever 603. Thus, the stem 646 may rotate to initiate a
full flush of
a toilet, for example, via the actuation control box 113 (FIG. 1).
[0044] As shown in FIGS. 6B and 6C, the angle a denotes the angle of rotation
that the first handle lever 603 has rotated from the neutral position (denoted
by
reference line A). Similarly, the angle 13 shows the angle of rotation that
the second
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handle lever 606 has rotated from the neutral position (denoted by reference
line A)
to the full flush position (denoted by reference line C).
[0045] As best shown in FIGS. 6B and 6C, the stop 663 abuts the projection
629, and the projection 629 engages the edge of the slot 643 of the second
handle
lever 606. Thus, the slot 643 in conjunction with the projection 629 acts to
define
the predetermined angle 13 of rotation. With the dual flush handle assembly
600 in
the position configured to initiate a full flush, the space 696 (FIG. 5A-5C)
between
the projection 629 and edge of the slot 643 no longer exists. Additionally,
the
space 699 between the stop 663 and opposite edge of the slot 643 has widened.
[0046] After a full flush has been initiated, the dual flush handle assembly
600
may automatically return to the neutral position shown in FIGS. 4A-4C. To this
end,
the second spring 619 or any other mechanism may return the dual flush handle
assembly 600 to the neutral position. In alternative embodiments, the dual
flush
handle assembly 600 may return to the neutral position using other mechanisms.
As non-limiting examples, the dual flush handle assembly 600 may return to the
neutral position due its own weight, from a flush valve dropping due to a drop
in
water level in the toilet tank, from a spring force inside the activation
control box
113 (FIG. 1), from a spring force associated with a flush valve, or from any
other
mechanism.
[0047] Referring next to FIGS. 7A-7F, shown is another example of a dual flush
handle assembly 700. The dual flush handle assembly 700 may be used to
initiate
a partial flush and/or a full flush of a toilet. To this end, the dual flush
handle
assembly 700 may be in communication with, for example, the actuation control
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box 113 (FIG. 1). FIGS. 7A and 7C show exploded views of the dual flush handle
assembly 700. The dual flush handle assembly 700 includes a first handle lever
703, a second handle lever 706, a bushing 709, and other components such as,
e.g., springs, retaining elements, and/or damper as discussed with respect to
the
dual flush handle assembly 600 of FIGS. 3A-3D.
[0048] The first handle lever 703 is shaped to be nested within the second
handle lever 706. In this sense, the first handle lever 703 and second handle
lever
706 are formed to facilitate at least a portion of the first handle lever 703
"fitting"
within a portion of the second handle lever 706. The second handle lever 706
may
fit within a profile of the first handle 703 so as to promote the appearance
of a
single handle. Accordingly, the dual flush handle assembly 700 may present an
appearance of a conventional toilet flush lever, while providing the
functionality of a
dual flush handle control.
[0049] The first handle lever 703 is configured to rotate about an axis by a
predetermined angle of rotation. To this end, the first handle lever 703
includes a
shoulder 729 accessible from a toilet-facing side or surface of the first
handle lever
703. The shoulder 729 limits the rotation of the first handle lever 703. The
second
handle lever 706 is also configured to rotate about an axis by a predetermined
angle of rotation. It is emphasized that the second handle lever 706 may
rotate by
a predetermined angle of rotation that is different than the angle of rotation
of the
first handle lever 703. The second handle lever 706 includes a slot 743, which
provides access to the shoulder 729 of the first handle lever 703 through the
second handle lever 706.
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[0050] A stem 746 is detachably attached to the second handle lever 706 to
extend outward from the toilet-facing side or surface of the second handle
lever
706. For example, the stem 746 may be secured to the second handle lever 706
by a fastener 783 (e.g., a screw) that extends through the first and second
handle
levers 703 and 706 as illustrated in the cut-away view of FIG. 7B. A shaped or
keyed slot 789 (FIG. 70) allows torque to be applied to the stem 746 via the
second
handle lever 706. A force applied to the first handle lever 703 is transferred
through
the second handle lever 706 to the stem 746. A cap 786 may be inserted into a
recess of the first handle lever to cover the fastener 783.
[0051] A bushing 709 is configured to extend through an opening in a wall of a
toilet tank. The bushing 709 includes a passage 759, a stop 763, a lip 765, a
rectangular segment 766, a threaded segment 769, and possibly other features
not
discussed in detail herein. The passage 759 extends longitudinally through the
bushing 709 and is configured for the stem 746 to pass at least partially
through the
bushing 709. The stop 763 extends from the bushing 709 and is configured to
extend through the slot 743 of the second handle lever 706 and to abut the
shoulder 729 of the first handle lever 703 as will be later described. The
distal end
of the bushing 709 may also be configured to detachably connect to the
actuation
control box 113 (FIG. 1).
[0052] The portion of the stem 746 extending from the second handle lever 706
includes a stem groove 756 at the distal end. The stem groove 756 is
configured to
receive a retaining element 726 to facilitate securing the first and second
handle
levers 703/706 to the bushing 709. To this end, with the stem groove 756
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extending through the passage 759 of the bushing 709, the retaining element
726
may clip to the stem groove 756 to retain the stem 746 within the bushing 709.
Thus, the retaining element 726 may retain the second handle lever 706 to the
bushing 709 in a lateral position, while facilitating rotation of the second
handle
lever 706 and/or first handle lever 703 with respect to the bushing 709. The
distal
end of the stem 746 can be configured to detachably engage a cam of the
actuation control box 113 (FIGS. 2A-2C).
[0053] The lip 765 of the bushing 709 is configured to abut an exterior
surface
of a toilet tank. The rectangular segment 766 is configured to be secured in a
corresponding opening in the toilet tank wall, thereby preventing rotational
movement of the bushing 709 with respect to the toilet tank wall. The threaded
segment 769 of the bushing 709 is configured to receive an appropriately
threaded
nut that abuts an interior surface of the toilet tank wall, thereby preventing
translational movement of the bushing 709 with respect to the toilet tank.
[0054] Next, a description of the general operation of the dual flush handle
assembly 700 is provided. FIGS. 7D, 7E, and 7F show progressions of the dual
flush handle assembly 700 being in a neutral position, initiating a partial
(or "quick")
flush, and initiating a full flush, respectively.
[0055] With reference to FIG. 7D, shown is the dual flush handle assembly 700
in a neutral position according to various embodiments of the present
disclosure.
The neutral position shown is the position to which the dual flush handle
assembly
700 returns after a flush has been initiated. As shown in FIG. 7D, the
shoulder 729
of the first handle lever 703 is positioned adjacent to the slot 743 of the
second
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handle lever 706. Also, the stop 763 of the bushing 709 extends through the
slot
743 of the second handle lever 706. As best shown in the cut-away view of FIG.
7D, there is a space 793 between the stop 763 and the shoulder 729. Further,
when the dual flush handle assembly 700 is in the neutral position the
shoulder 729
is located below an upper edge of the slot 743. Additionally, the stop 763 of
the
bushing 709 is engaged with the lower edge of the slot 743.
[0056] Turning now to FIG. 7E, shown is the dual flush handle assembly 700 in
a position configured to initiate a partial (or "quick") flush of a toilet.
The dual flush
handle assembly 700 may arrive in this position, for example, by a user
pressing on
the first handle lever 703 as indicated by the arrow. Rotating the first
handle lever
703 pushes against the second handle lever 706 causing the second handle lever
706, and thus the stem 746, to rotate and disengage with the lower edge of the
slot
743. The rotation of the first handle lever 703 is limited by the shoulder 729
of the
first handle lever 703 making contact with the stop 763 of the bushing 709. By
rotating the first handle lever 703 by the amount limited by the shoulder 729
and
stop 763, the stem 746 rotates a predetermined amount to initiate a partial
flush, for
example, through the actuation control box 113 (FIG. 1) as described above.
[0057] After a partial flush has been initiated, the dual flush handle
assembly
700 may automatically return to the neutral position shown in FIG. 7D. To
this, end,
a spring or other appropriate mechanism may cause the dual flush handle
assembly 700 to return to the neutral position.
[0058] Turning to FIG. 7F, shown is the dual flush handle assembly 700 in a
position configured to initiate a full flush of a toilet. The dual flush
handle assembly
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700 may arrive in this position, for example, by a user pressing the second
handle
lever 706 as indicated by the arrow. By pressing on the second handle lever
706,
the first handle lever 703 rotates until the shoulder 729 of the first handle
lever 703
contacts the stop 763 of the bushing 709. While the first handle lever 703
stops
rotating when the shoulder 729 engages with the stop 763, the second handle
lever
706 may continue to rotate until the upper edge of the slot 743 of the second
handle lever 706 contacts the stop 763 of the bushing 709. Thus, the stem 746
may rotate to initiate a full flush of a toilet, for example, via the
actuation control box
113 (FIG. 1).
[0059] As best shown in cut-away view of FIG. 7F, the stop 763 engages with
the upper edge of the slot 743 of the second handle lever 706. Thus, the slot
743
in conjunction with the stop 763 acts to define the predetermined angle of
rotation.
With the dual flush handle assembly 700 in the position configured to initiate
a full
flush, the space 799 between the stop 763 and the lower edge of the slot 743
has
widened.
[0060] After a full flush has been initiated, the dual flush handle assembly
700
may automatically return to the neutral position shown in FIG. 7D. To this
end, a
spring or other appropriate mechanism may return the dual flush handle
assembly
700 to the neutral position. In alternative embodiments, the dual flush handle
assembly 700 may return to the neutral position using other mechanisms. As non-
limiting examples, the dual flush handle assembly 700 may return to the
neutral
position due its own weight, from a flush valve dropping due to a drop in
water level
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in the toilet tank, from a spring force inside the activation control box 113
(FIG. 1),
from a spring force associated with a flush valve, or from any other
mechanism.
[0061] Referring next to FIGS. 8A-8C, shown is another example of a dual flush
handle assembly 800 that may be used to initiate a partial flush and/or a full
flush of
a toilet. To this end, the dual flush handle assembly 800 may be in
communication
with, for example, the actuation control box 113 (FIG. 1). FIG. 8A shows an
exploded view of the dual flush handle assembly 800. The dual flush handle
assembly 800 includes a first handle lever 803, a second handle lever 806, a
bushing 809, and other components such as, e.g., springs, retaining elements,
and/or damper as discussed with respect to the dual flush handle assembly 600
of
FIGS. 3A-3D.
[0062] The first handle lever 803 is shaped to be nested within the second
handle lever 806. The first handle lever 803 is configured to rotate about an
axis by
a predetermined angle of rotation. To this end, the first handle lever 803
includes a
post 833 extending from a toilet-facing side or surface of the first handle
lever 803.
The first handle lever 803 also includes a shoulder (not shown) accessible
from a
toilet-facing side or surface of the first handle lever 803. As with the
example of
FIGS. 7A-7F, the shoulder limits the rotation of the first handle lever 803.
The
second handle lever 806 is also configured to rotate about an axis by a
predetermined angle of rotation. The second handle lever 806 may rotate by a
predetermined angle of rotation that is different than the angle of rotation
of the first
handle lever 803. The second handle lever 806 includes a slot 843, which
provides
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access to the shoulder of the first handle lever 803 through the second handle
lever
806.
[0063] A stem 846 may be integrally cast as part of the second handle lever
806 to extend from both the outward and toilet-facing sides or surfaces of the
second handle lever 806. In alternative embodiments, the stem 646 may extend
from only one of the outward or toilet-facing surfaces of the second handle
lever
806. The stem 846 includes a bore 849 accessible from the outward end of the
stem 846. The bore 849 is configured to receive the post 833 of the first
handle
lever 803. Although the stem 846 shown in FIGS. 8A-8C is configured to receive
the post 833, in alternative embodiments the post 833 may include a bore
configured to receive the stem 846. A force applied to the first handle lever
803 is
transferred through the second handle lever 806 to the stem 846.
[0064] The first handle lever 803 may be detachably attached to the second
handle lever 806. For example, the first handle lever 803 may be attached to
the
second handle lever 806 by a snap-fit connection as illustrated in FIGS. 8B
and 8C.
After aligning the post 833 with the bore 849 of the stem 846, the first and
second
handle levers 803/806 may be pressed together to engage the snap-fit
connection
as shown in the enlarged view of FIG. 8C. The snap-fit connection allows
rotation
of the first handle lever 803 about the post 833 independent of the second
handle
lever 806.
[0065] A bushing 809 is configured to extend through an opening in a wall of a
toilet tank. The bushing 809 includes a passage, a stop, a lip, a rectangular
segment, and a threaded segment as discussed with respect to the example of
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FIGS. 7A-7F, and possibly other features not discussed in detail herein. The
passage extends longitudinally through the bushing 809 and is configured for
the
stem 846 to pass at least partially through the bushing 809. The stop 863
extends
from the bushing 809 and is configured to extend through the slot 843 of the
second handle lever 806 and to abut the shoulder (not shown) of the first
handle
lever 803 as previously described. The distal end of the bushing 809 may also
be
configured to detachably connect to the actuation control box 113 (FIG. 1).
[0066] The portion of the stem 846 extending from the second handle lever 806
includes a stem groove 856 at the distal end that is configured to receive a
retaining
element 826 to facilitate securing the first and second handle levers 803/806
to the
bushing 809. To this end, the retaining element 826 may clip to the stem
groove
856 to retain the stem 846 within the bushing 809. The distal end of the stem
846
can be configured to detachably engage a cam of the actuation control box 113
(FIGS. 2A-2C).
[0067] Operation of the dual flush handle assembly 800 is similar to that
described with respect to the dual flush handle assembly 700 of FIGS. 7D-7F,
which show progressions of the dual flush handle assembly 700 being in a
neutral
position, initiating a partial (or "quick") flush, and initiating a full
flush, respectively.
[0068] Referring next to FIGS. 9A-9C, shown is another example of a dual flush
handle assembly 900 that may be used to initiate a partial flush and/or a full
flush of
a toilet. To this end, the dual flush handle assembly 900 may be in
communication
with, for example, the actuation control box 113 (FIG. 1). FIGS. 9A and 9B
show
exploded views of the dual flush handle assembly 900. The dual flush handle
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assembly 900 includes a first handle lever 903, a second handle lever 906, a
bushing 909, and other components such as, e.g., springs, retaining elements,
and/or damper as discussed with respect to the dual flush handle assembly 600
of
FIGS. 3A-3D.
[0069] The first handle lever 903 is shaped to be nested within the second
handle lever 906. The first handle lever 903 is configured to rotate about an
axis by
a predetermined angle of rotation. To this end, the dual flush handle assembly
900
includes a shaft 933 that, when engaged with a keyed or shaped slot 999 (FIG.
9C)
of the first handle lever 903, extends from a toilet-facing side or surface of
the first
handle lever 903. The shaft 933 may be secured to the first handle lever 903
by a
press-fit connection. The first handle lever 903 also includes a shoulder (not
shown) accessible from a toilet-facing side or surface of the first handle
lever 903.
As with the example of FIGS. 7A-7F, the shoulder limits the rotation of the
first
handle lever 903. The second handle lever 906 is also configured to rotate
about
an axis by a predetermined angle of rotation. The second handle lever 906 may
rotate by a predetermined angle of rotation that is different than the angle
of
rotation of the first handle lever 903. The second handle lever 906 includes a
slot
943, which provides access to the shoulder of the first handle lever 903
through the
second handle lever 906.
[0070] A stem 946 is detachably attached to the second handle lever 906 to
extend outward from the toilet-facing side or surface of the second handle
lever
906. For example, the stem 946 may be secured to the second handle lever 906
by a press-fit connection with a shaped or keyed slot 989 as illustrated in
the cut-
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away view of FIG. 9C. The shaped or keyed slot 989 allows torque to be applied
to
the stem 946 via the second handle lever 906. Referring back to FIGS. 9A and
9B,
the stem 946 includes a bore 949 accessible from the outward end of the stem
946.
The bore 949 is configured to receive the shaft 933 of the first handle lever
903.
The shaft 933 that extends through the second handle lever 906 to engage with
the
bore 949 of the stem 946. The shaft 933 enhances the press-fit between the
stem
946 and the shaped or keyed slot 989 to secure the stem 946 to the second
handle
lever 906. Protrusions 936 around the shaft 933 prevent the shaft 933 from
being
pulled through the second handle lever 906 by the first handle lever 903 while
allowing for independent rotation. A force applied to the first handle lever
903 is
transferred through the second handle lever 906 to the stem 946.
[0071] A bushing 909 is configured to extend through an opening in a wall of a
toilet tank. The bushing 909 includes a passage, a stop, a lip, a rectangular
segment, and a threaded segment as discussed with respect to the example of
FIGS. 7A-7F, and possibly other features not discussed in detail herein. The
passage extends longitudinally through the bushing 909 and is configured for
the
stem 946 to pass at least partially through the bushing 909. The stop 963
extends
from the bushing 909 and is configured to extend through the slot 943 of the
second handle lever 906 and to abut the shoulder (not shown) of the first
handle
lever 903 as described previously. The distal end of the bushing 909 may also
be
configured to detachably connect to the actuation control box 113 (FIG. 1).
[0072] The portion of the stem 946 extending from the second handle lever 906
includes a stem groove 956 at the distal end that is configured to receive a
retaining
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element 926 to facilitate securing the first and second handle levers 903/906
to the
bushing 909. To this end, the retaining element 926 may clip to the stem
groove
956 to retain the stem 946 within the bushing 909. The distal end of the stem
946
can be configured to detachably engage a cam of the actuation control box 113
(FIGS. 2A-2C).
[0073] Operation of the dual flush handle assembly 900 is similar to that
described with respect to the dual flush handle assembly 700 of FIGS. 7D-7F,
which show progressions of the dual flush handle assembly 700 being in a
neutral
position, initiating a partial (or "quick") flush, and initiating a full
flush, respectively.
[0074] Referring now to FIGS. 10A and 10B, shown is another example of a
dual flush handle assembly 1000 that may be used to initiate a partial flush
and/or a
full flush of a toilet. The example of FIGS. 10A and 10B is similar to the
example of
FIGS. 9A-9C with the first handle lever 1003 detachably attached to the second
handle lever 1006 using a male retaining element 1023 and a female retaining
element 1099. As shown in the cut-away view of FIG. 10B, a post 1033 of the
first
handle lever 1003 extends into and/or through female retaining element 1099 of
the
second handle lever 1006. A shoulder of the post 1033, which fits against an
outer
face of the female retaining element 1099, positions the first handle lever
1003 with
respect to the second handle lever 1006. A protrusion of the male retaining
element 1023 engages a recess of the post 1033 through a shaped or keyed slot
1089 as illustrated in the cut-away view of FIG. 10B. A press-fit connection
between the protrusion of the male retaining element 1023 and the recess of
the
post 1033 secures the first handle lever 1003 in position. A stem 946 is
detachably
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attached to the second handle lever 1006 to extend outward from the toilet-
facing
side or surface of the second handle lever 1006. The stem 946 may be secured
to
the second handle lever 1006 by a press-fit connection with the shaped or
keyed
slot 1089 as illustrated in the cut-away view of FIG. 10B. The shaped or keyed
slot
1089 allows torque to be applied to the stem 946 via the second handle lever
1006
as described with respect to the example of FIGS. 9A-9C.
[0075] Referring next to FIGS. 11A-11E, shown is another example of a dual
flush handle assembly 1100. The dual flush handle assembly 1100 may be used to
initiate a partial flush and/or a full flush of a toilet. To this end, the
dual flush handle
assembly 1100 may be in communication with, for example, the actuation control
box 113 (FIG. 1). FIGS. 11A and 11B show exploded views of the dual flush
handle assembly 1100. The dual flush handle assembly 1100 includes a first
handle lever 1103, a second handle lever 1106, a bushing 1109, and other
components such as, e.g., springs, retaining elements, and/or damper as
discussed
with respect to the dual flush handle assembly 600 of FIGS. 3A-3D.
[0076] The first handle lever 1103 is shaped to be nested within the second
handle lever 1106. In this sense, the first handle lever 1103 and second
handle
lever 1106 are formed to facilitate at least a portion of the first handle
lever 1103
"fitting" within a portion of the second handle lever 1106. The second handle
lever
1106 may fit within a profile of the first handle 1103 so as to promote the
appearance of a single handle. Accordingly, the dual flush handle assembly
1100
may present an appearance of a conventional toilet flush lever, while
providing the
functionality of a dual flush handle control.
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[0077] The first handle lever 1103 is configured to rotate about an axis by a
predetermined angle of rotation. To this end, the first handle lever 1103
includes
an extension 1129 and post 1133, both extending from a toilet-facing side or
surface of the first handle lever 1103. In various embodiments, the post 1133
includes a snap-fit connection to facilitate retaining the first handle lever
1103 to the
dual flush handle assembly 1100. In other implementations, the post 1133 may
include a post groove to facilitate retaining the first handle lever 1103 to
the dual
flush handle assembly 1100.
[0078] The second handle lever 1106 is also configured to rotate about an axis
by a predetermined angle of rotation. It is emphasized that the second handle
lever
1106 may rotate by a predetermined angle of rotation that is different than
the
angle of rotation of the first handle lever 1103. The second handle lever 1106
includes a slot 1143, which allows the extension 1129 to pass through the
second
handle lever 1106.
[0079] A stem 1146 may be integrally cast as part of the second handle lever
1106 to extend from both the outward and toilet-facing sides or surfaces of
the
second handle lever 1106. In alternative embodiments, the stem 1146 may extend
from only one of the outward or toilet-facing surfaces of the second handle
lever
1106. The stem 1146 includes a bore 1149 accessible from the outward end of
the
stem 1146. The bore 1149 is configured to receive the post 1133 of the first
handle
lever 1103. Although the stem 1146 shown in FIGS. 11A and 11B is configured to
receive the post 1133, in alternative embodiments the post 1133 may include a
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bore configured to receive the stem 1146. A force applied to the first handle
lever
1103 is transferred through the second handle lever 1106 to the stem 1146.
[0080] The first handle lever 1103 may be detachably attached to the second
handle lever 1106. For example, the first handle lever 1103 may be attached to
the
second handle lever 1106 by a snap-fit connection as illustrated in FIGS. 8B
and
8C. After aligning the post 1133 with the bore 1149 of the stem 1146, the
first and
second handle levers 1103/1106 may be pressed together to engage the snap-fit
connection as shown in the enlarged view of FIG. 8C. The snap-fit connection
allows rotation of the first handle lever 1103 about the post 1133 independent
of the
second handle lever 1106.
[0081] A bushing 1109 is configured to extend through an opening in a wall of
a
toilet tank. The bushing 1109 includes a cut-out 1163. The bushing 1109 also
includes a passage, a lip, a rectangular segment, a threaded segment as
discussed
with respect to the example of FIGS. 7A-7F, and possibly other features not
discussed in detail herein. The passage extends longitudinally through the
bushing
1109 and is configured for the stem 1146 to pass at least partially through
the
bushing 1109. The cut-out 1163 includes a slot configured to receive the
extension
1129 through the slot 1143 of the second handle lever 1106. The distal end of
the
bushing 1109 may also be configured to detachably connect to the actuation
control
box 113 (FIG. 1).
[0082] The portion of the stem 1146 extending from the second handle lever
1106 includes a stem groove 1156 at the distal end. The stem groove 1156 is
configured to receive a retaining element 1126 to facilitate securing the
first and
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second handle levers 1103/1106 to the bushing 1109. To this end, with the stem
groove 1156 extending through the passage of the bushing 1109, the retaining
element 1126 may clip to the stem groove 1156 to retain the stem 1146 within
the
bushing 1109. Thus, the retaining element 1126 may retain the second handle
lever 1106 to the bushing 1109 in a lateral position, while facilitating
rotation of the
second handle lever 1106 and/or first handle lever 1103 with respect to the
bushing
1109. The distal end of the stem 1146 can be configured to detachably engage a
cam of the actuation control box 113 (FIGS. 2A-2C).
[0083] The lip of the bushing 1109 is configured to abut an exterior surface
of a
toilet tank. The rectangular segment is configured to be secured in a
corresponding
opening in the toilet tank wall, thereby preventing rotational movement of the
bushing 1109 with respect to the toilet tank wall. The threaded segment of the
bushing 1109 is configured to receive an appropriately threaded nut that abuts
an
interior surface of the toilet tank wall, thereby preventing translational
movement of
the bushing 1109 with respect to the toilet tank.
[0084] Next, a description of the general operation of the dual flush handle
assembly 1100 is provided. FIGS. 11C, 11D, and 11E show progressions of the
dual flush handle assembly 1100 being in a neutral position, initiating a
partial (or
"quick") flush, and initiating a full flush, respectively.
[0085] With reference to FIG. 11C, shown is the dual flush handle assembly
1100 in a neutral position according to various embodiments of the present
disclosure. The neutral position shown is the position to which the dual flush
handle assembly 1100 returns after a flush has been initiated. As shown in
FIG.
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11C, the cut-out 1163 of the bushing 1109 is positioned adjacent to the slot
1143 of
the second handle lever 1106. Also, the extension 1129 of the second handle
lever
extends through the slot 1143 of the second handle lever 1106. As best shown
in
the cut-away view of FIG. 11C, there is a space 1193 between the extension
1129
and the lower edge of the cut-out 1163. Further, when the dual flush handle
assembly 1100 is in the neutral position the extension 1129 is located below
an
upper edge of the slot 1143.
[0086] Turning now to FIG. 11D, shown is the dual flush handle assembly 1100
in a position configured to initiate a partial (or "quick") flush of a toilet.
The dual
flush handle assembly 1100 may arrive in this position, for example, by a user
pressing on the first handle lever 1103 as indicated by the arrow. Rotating
the first
handle lever 1103 pushes against the second handle lever 1106 causing the
second handle lever 1106, and thus the stem 1146, to rotate. The rotation of
the
first handle lever 1103 is limited by the lower edge of the cut-out 1163 of
the
bushing 1109 making contact with the extension 1129 of the first handle lever
1103.
By rotating the first handle lever 1103 by the amount limited by the extension
1129
and cut-out 1163, the stem 1146 rotates a predetermined amount to initiate a
partial flush, for example, through the actuation control box 113 (FIG. 1) as
described above.
[0087] After a partial flush has been initiated, the dual flush handle
assembly
1100 may automatically return to the neutral position shown in FIG. 11C. To
this,
end, a spring or other appropriate mechanism may cause the dual flush handle
assembly 1100 to return to the neutral position.
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[0088] Turning to FIG. 11E, shown is the dual flush handle assembly 1100 in a
position configured to initiate a full flush of a toilet. The dual flush
handle assembly
1100 may arrive in this position, for example, by a user pressing the second
handle
lever 1106 as indicated by the arrow. By pressing on the second handle lever
1106, the first handle lever 1103 rotates until the extension of the bushing
1109
contacts the upper edge of the slot 1143 of the first handle lever 1103. While
the
first handle lever 1103 stops rotating when the cut-out 1163 engages with the
extension 1129, the second handle lever 1106 may continue to rotate until the
upper edge of the slot 1143 of the second handle lever 1106 contacts the
extension
1129 of the first handle lever 1103. Thus, the stem 1146 may rotate to
initiate a full
flush of a toilet, for example, via the actuation control box 113 (FIG. 1).
[0089] As best shown in cut-away view of FIG. 11E, the extension 1129
engages with the upper edge of the slot 1143 of the second handle lever 1106.
Thus, the slot 1143 in conjunction with the extension 1129 acts to define the
predetermined angle of rotation. With the dual flush handle assembly 1100 in
the
position configured to initiate a full flush, the space 1199 between the
extension
1129 and the lower edge of the slot 1143 has widened.
[0090] After a full flush has been initiated, the dual flush handle assembly
1100
may automatically return to the neutral position shown in FIG. 11C. To this
end, a
spring or other appropriate mechanism may return the dual flush handle
assembly
1100 to the neutral position. In alternative embodiments, the dual flush
handle
assembly 1100 may return to the neutral position using other mechanisms. As
non-
limiting examples, the dual flush handle assembly 1100 may return to the
neutral
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position due its own weight, from a flush valve dropping due to a drop in
water level
in the toilet tank, from a spring force inside the activation control box 113
(FIG. 1),
from a spring force associated with a flush valve, or from any other
mechanism.
[0091] Referring next to FIGS. 12A-12E, shown is another example of a dual
flush handle assembly 1200. The dual flush handle assembly 1200 may be used to
initiate a partial flush and/or a full flush of a toilet. To this end, the
dual flush handle
assembly 1200 may be in communication with, for example, the actuation control
box 113 (FIG. 1). FIGS. 12A and 12B show exploded views of the dual flush
handle assembly 1200. The dual flush handle assembly 1200 includes a first
handle lever 1203, a second handle lever 1206, a bushing 1209, and other
components such as, e.g., springs, retaining elements, and/or damper as
discussed
with respect to the dual flush handle assembly 600 of FIGS. 3A-3D.
[0092] The first handle lever 1203 is shaped to be nested within the second
handle lever 1206. In this sense, the first handle lever 1203 and second
handle
lever 1206 are formed to facilitate at least a portion of the first handle
lever 1203
"fitting" within a portion of the second handle lever 1206. The second handle
lever
1206 may fit within a profile of the first handle 1203 so as to promote the
appearance of a single handle. Accordingly, the dual flush handle assembly
1200
may present an appearance of a conventional toilet flush lever, while
providing the
functionality of a dual flush handle control.
[0093] The first handle lever 1203 is configured to rotate about an axis by a
predetermined angle of rotation. To this end, the first handle lever 1203
includes
projection 1229 and post 1233, both extending from a toilet-facing side or
surface
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of the first handle lever 1203. In various embodiments, the post 1233 includes
a
snap-fit connection to facilitate retaining the first handle lever 1203 to the
dual flush
handle assembly 1200. In other implementations, the post 1233 may include a
post groove to facilitate retaining the first handle lever 1203 to the dual
flush handle
assembly 1200.
[0094] The second handle lever 1206 is also configured to rotate about an axis
by a predetermined angle of rotation. It is emphasized that the second handle
lever
1206 may rotate by a predetermined angle of rotation that is different than
the
angle of rotation of the first handle lever 1203. The second handle lever 1206
includes a slot 1243, which allows the projection 1229 to pass through the
second
handle lever 1206.
[0095] A stem 1246 may be integrally cast as part of the second handle lever
1206 to extend from both the outward and toilet-facing sides or surfaces of
the
second handle lever 1206. In alternative embodiments, the stem 1246 may extend
from only one of the outward or toilet-facing surfaces of the second handle
lever
1206. The stem 1246 includes a bore 1249 accessible from the outward end of
the
stem 1246. The bore 1249 is configured to receive the post 1233 of the first
handle
lever 1203. Although the stem 1246 shown in FIGS. 12A and 12B is configured to
receive the post 1233, in alternative embodiments the post 1233 may include a
bore configured to receive the stem 1246. A force applied to the first handle
lever
1203 is transferred through the second handle lever 1206 to the stem 1246.
[0096] The first handle lever 1203 may be detachably attached to the second
handle lever 1206. For example, the first handle lever 1203 may be attached to
the
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second handle lever 1206 by a snap-fit connection as illustrated in FIGS. 8B
and
8C. After aligning the post 1233 with the bore 1249 of the stem 1246, the
first and
second handle levers 1203/1206 may be pressed together to engage the snap-fit
connection as shown in the enlarged view of FIG. 8C. The snap-fit connection
allows rotation of the first handle lever 1203 about the post 1233 independent
of the
second handle lever 1206.
[0097] A bushing 1209 is configured to extend through an opening in a wall of
a
toilet tank. The bushing 1209 includes a stop 1263. The bushing 1209 also
includes a passage, a lip, a rectangular segment, a threaded segment as
discussed
with respect to the example of FIGS. 7A-7F, and possibly other features not
discussed in detail herein. The passage extends longitudinally through the
bushing
1209 and is configured for the stem 1246 to pass at least partially through
the
bushing 1209. The stop 1263 extends from the bushing 1209 and is configured to
extend through the slot 1243 of the second handle lever 1206 and to abut the
projection 1229 of the first handle lever 1203 as will be later described. The
distal
end of the bushing 1209 may also be configured to detachably connect to the
actuation control box 113 (FIG. 1).
[0098] The portion of the stem 1246 extending from the second handle lever
1206 includes a stem groove 1256 at the distal end. The stem groove 1256 is
configured to receive a retaining element 1226 to facilitate securing the
first and
second handle levers 1203/1206 to the bushing 1209. To this end, with the stem
groove 1256 extending through the passage of the bushing 1209, the retaining
element 1226 may clip to the stem groove 1256 to retain the stem 1246 within
the
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bushing 1209. Thus, the retaining element 1226 may retain the second handle
lever 1206 to the bushing 1209 in a lateral position, while facilitating
rotation of the
second handle lever 1206 and/or first handle lever 1203 with respect to the
bushing
1209. The distal end of the stem 1246 can be configured to detachably engage a
cam of the actuation control box 113 (FIGS. 2A-2C).
[0099] The lip of the bushing 1209 is configured to abut an exterior surface
of a
toilet tank. The rectangular segment is configured to be secured in a
corresponding
opening in the toilet tank wall, thereby preventing rotational movement of the
bushing 1209 with respect to the toilet tank wall. The threaded segment of the
bushing 1209 is configured to receive an appropriately threaded nut that abuts
an
interior surface of the toilet tank wall, thereby preventing translational
movement of
the bushing 1209 with respect to the toilet tank.
[00100] Next, a description of the general operation of the dual flush handle
assembly 1200 is provided. FIGS. 12C, 12D, and 12E show progressions of the
dual flush handle assembly 1200 being in a neutral position, initiating a
partial (or
"quick") flush, and initiating a full flush, respectively.
[00101] With reference to FIG. 12C, shown is the dual flush handle assembly
1200 in a neutral position according to various embodiments of the present
disclosure. The neutral position shown is the position to which the dual flush
handle assembly 1200 returns after a flush has been initiated. As shown in
FIG.
12C, the projection 1229 of the first handle lever 1203 is positioned within
the slot
1243 of the second handle lever 1206. Also, the stop 1263 of the bushing 1209
is
positioned within the slot 1243 of the second handle lever 1206. As best shown
in
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the cut-away view of FIG. 12C, there is a space 1293 between the stop 1263 and
the projection 1229. Further, there is a space 1296 between the projection
1229
and an upper edge of the slot 1243. Additionally, the stop 1263 of the bushing
1209 is engaged with the opposite edge of the slot 1243.
[00102] Turning now to FIG. 12D, shown is the dual flush handle assembly 1200
in a position configured to initiate a partial (or "quick") flush of a toilet.
The dual
flush handle assembly 1200 may arrive in this position, for example, by a user
pressing on the first handle lever 1203 as indicated by the arrow. Rotating
the first
handle lever 1203 pushes against the second handle lever 1206 causing the
second handle lever 1206, and thus the stem 1246, to rotate as well. The
rotation
of the first handle lever 1203 is limited by the projection 1229 of the first
handle
lever 1203 making contact with the stop 1263 of the bushing 1209. By rotating
the
first handle lever 1203 by the predetermined amount, the stem 1246 rotates to
initiate a partial flush, for example, through the actuation control box 113
(FIG. 1).
[00103] With the projection 1229 engaging the stop 1263, there is a space 1299
between the stop 1263 and a lower edge of the slot 1243. Additionally, the
space
1296 between the projection 1229 and lower end of the slot 1243 still exists.
[00104] After a partial flush has been initiated, the dual flush handle
assembly
1200 may automatically return to the neutral position shown in FIG. 12C. To
this,
end, a spring or other appropriate mechanism may cause the dual flush handle
assembly 1200 to return to the neutral position.
[00105] Turning to FIG. 12E, shown is the dual flush handle assembly 1200 in a
position configured to initiate a full flush of a toilet. The dual flush
handle assembly
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1200 may arrive in this position, for example, by a user pressing the second
handle
lever 1206. By pressing on the second handle lever 1206 as indicated by the
arrow, the first handle lever 1203 to rotate in conjunction with the second
handle
lever 1206 until the projection 1229 of the first handle lever 1203 contacts
the stop
1263 of the bushing 1209. While the first handle lever 1203 stops rotating,
the
second handle lever 1206 may continue to rotate until the upper edge of the
slot
1243 of the second handle lever 1206 contacts the projection 1229 of the first
handle lever 1203. Thus, the stem 1246 may rotate to initiate a full flush of
a toilet,
for example, via the actuation control box 113 (FIG. 1).
[00106] As best shown in the cut-away view of FIG. 12E, the stop 1263 abuts
the
projection 1229, and the projection 1229 engages the upper edge of the slot
1243
of the second handle lever 1206. Thus, the slot 1243 in conjunction with the
projection 1229 acts to define the predetermined angle of rotation. With the
dual
flush handle assembly 1200 in the position configured to initiate a full
flush, the
space 1296 (FIG. 12C) between the projection 1229 and upper edge of the slot
1243 no longer exists. Additionally, the space 1299 between the stop 1263 and
lower edge of the slot 1243 has widened.
[00107] After a full flush has been initiated, the dual flush handle assembly
1200
may automatically return to the neutral position shown in FIG. 12C. To this
end, a
spring or other appropriate mechanism may return the dual flush handle
assembly
1200 to the neutral position. In alternative embodiments, the dual flush
handle
assembly 1200 may return to the neutral position using other mechanisms. As
non-
limiting examples, the dual flush handle assembly 1200 may return to the
neutral
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position due its own weight, from a flush valve dropping due to a drop in
water level
in the toilet tank, from a spring force inside the activation control box 113
(FIG. 1),
from a spring force associated with a flush valve, or from any other
mechanism.
[00108] Referring next to FIGS. 13A-13F, shown is another example of a dual
flush handle assembly 1300. The dual flush handle assembly 1300 may be used to
initiate a partial flush and/or a full flush of a toilet. To this end, the
dual flush handle
assembly 1300 may be in communication with, for example, the actuation control
box 113 (FIG. 1). FIGS. 13A and 13B show exploded views of the dual flush
handle assembly 1300. The dual flush handle assembly 1300 includes a first
handle lever 1303, a second handle lever 1306, a bushing 1309, and other
components such as, e.g., springs, retaining elements, and/or damper as
discussed
with respect to the dual flush handle assembly 600 of FIGS. 3A-3D.
[00109] The first handle lever 1303 is shaped to be nested within the second
handle lever 1306. In this sense, the first handle lever 1303 and second
handle
lever 1306 are formed to facilitate at least a portion of the first handle
lever 1303
"fitting" within a portion of the second handle lever 1306. The second handle
lever
1306 may fit within a profile of the first handle 1303 so as to promote the
appearance of a single handle. Accordingly, the dual flush handle assembly
1300
may present an appearance of a conventional toilet flush lever, while
providing the
functionality of a dual flush handle control.
[00110] The first handle lever 1303 is configured to rotate about an axis by a
predetermined angle of rotation. To this end, the first handle lever 1303
includes a
shoulder 1329 accessible from a toilet-facing side or surface of the first
handle lever
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Attorney Docket: 171901-1280
1303. The shoulder 1329 limits the rotation of the first handle lever 1303.
The
second handle lever 1306 is also configured to rotate about an axis by a
predetermined angle of rotation. It is emphasized that the second handle lever
1306 may rotate by a predetermined angle of rotation that is different than
the
angle of rotation of the first handle lever 1303. The second handle lever 1306
includes a slot 1343, which provides access to the shoulder 1329 of the first
handle
lever 1303 through the second handle lever 1306. The second handle lever 1306
also includes a lip (or tab) 1383 that engages with a recess 1386 of the first
handle
lever 1303. Rotation of the second handle lever 1306 engages the lip 1383 with
the
recess 1386 to cause corresponding rotation of the first handle lever 1303.
The
first handle lever 1303 may be rotated without producing a corresponding
rotation
of the second handle lever 1306. When the first handle lever 1303 is rotated,
the
lip 1383 is disengaged from the recess 1386, allowing the second handle lever
1306 to remain stationary.
[00111] A stem 1346 is attached to the first handle lever 1303 to extend
outward
from the toilet-facing side or surface of the first handle lever 1303. For
example,
the stem 1346 may be integrally cast with the first handle lever 1303 as
illustrated in
the cut-away view of FIG. 13C. A force applied to the first handle lever 1303
applies torque to the stem 1346. A force applied to the second handle lever
1306
is transferred through the lip 1383 of the second handle lever 1306 to the
first
handle lever 1303 to apply a torque to the stem 1346.
[00112] A bushing 1309 is configured to extend through an opening in a wall of
a
toilet tank. The bushing 1309 includes a stop 1363. The bushing 1209 also
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includes a passage, a lip, a rectangular segment, a threaded segment as
discussed
with respect to the example of FIGS. 7A-7F, and possibly other features not
discussed in detail herein. The passage extends longitudinally through the
bushing
1309 and is configured for the stem 1346 to pass at least partially through
the
bushing 1309. The stop 1363 extends from the bushing 1309 and is configured to
extend through the slot 1343 of the second handle lever 1306 and to abut the
shoulder 1329 of the first handle lever 1303 as will be later described. The
distal
end of the bushing 1309 may also be configured to detachably connect to the
actuation control box 113 (FIG. 1).
[00113] The portion of the stem 1346 extending from the first handle lever
1303
includes a stem groove 1356 at the distal end. The stem groove 1356 is
configured
to receive a retaining element 1326 to facilitate securing the first and
second handle
levers 1303/1306 to the bushing 1309. To this end, with the stem groove 1356
extending through the second handle lever 1306 and the passage of the bushing
1309, the retaining element 1326 may clip to the stem groove 1356 to retain
the
stem 1346 within the bushing 1309. Thus, the retaining element 1326 may retain
the first and second handle levers 1303/1306 to the bushing 1309 in a lateral
position, while facilitating rotation of the second handle lever 1306 and/or
first
handle lever 1303 with respect to the bushing 1309. The distal end of the stem
1346 can be configured to detachably engage a cam of the actuation control box
113 (FIGS. 2A-2C).
[00114] The lip of the bushing 1309 is configured to abut an exterior surface
of a
toilet tank. The rectangular segment is configured to be secured in a
corresponding
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opening in the toilet tank wall, thereby preventing rotational movement of the
bushing 1309 with respect to the toilet tank wall. The threaded segment of the
bushing 1309 is configured to receive an appropriately threaded nut that abuts
an
interior surface of the toilet tank wall, thereby preventing translational
movement of
the bushing 1309 with respect to the toilet tank.
[00115] Next, a description of the general operation of the dual flush handle
assembly 1300 is provided. FIGS. 13D, 13E, and 13F show progressions of the
dual flush handle assembly 1300 being in a neutral position, initiating a
partial (or
"quick") flush, and initiating a full flush, respectively.
[00116] With reference to FIG. 13D, shown is the dual flush handle assembly
1300 in a neutral position according to various embodiments of the present
disclosure. The neutral position shown is the position to which the dual flush
handle assembly 1300 returns after a flush has been initiated. As shown in
FIG.
13D, the shoulder 1329 of the first handle lever 1303 is in line with the slot
1343 of
the second handle lever 1306. Also, the stop 1363 of the bushing 1309 extends
through the slot 1343 of the second handle lever 1306. As best shown in the
cut-
away view of FIG. 13D, there is a space 1393 between the stop 1363 and the
shoulder 1329. Further, when the dual flush handle assembly 1300 is in the
neutral
position the shoulder 1329 is located above an upper edge of the slot 1343.
Additionally, the stop 1363 of the bushing 1309 is engaged with the lower edge
of
the slot 1343.
[00117] Turning now to FIG. 13E, shown is the dual flush handle assembly 1300
in a position configured to initiate a partial (or "quick") flush of a toilet.
The dual
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flush handle assembly 1300 may arrive in this position, for example, by a user
pressing on the second handle lever 1306 as indicated by the arrow. The second
handle lever 1306 pushes against the first handle lever 1303 via the lip 1383
and
recess 1386 causing the first handle lever 1303, and thus the stem 1346, to
rotate
and disengage the stop 1363 with the lower edge of the slot 1343. The rotation
of
the second handle lever 1306 is limited by the upper edge of the slot 1343 of
the
second handle lever 1306 making contact with the stop 1363 of the bushing
1309.
While the second handle lever 1306 stops rotating when the upper edge of the
slot
1343 engages with the stop 1363, the first handle lever 1303 may continue to
rotate
until the shoulder 1329 of the first handle lever 1303 contacts the stop 1363
of the
bushing 1309. By rotating the second handle lever 1306 by the amount limited
by
the slot 1343 and stop 1363, the stem 1346 rotates a predetermined amount to
initiate a partial flush, for example, through the actuation control box 113
(FIG. 1) as
described above.
[00118] After a partial flush has been initiated, the dual flush handle
assembly
1300 may automatically return to the neutral position shown in FIG. 13D. To
this,
end, a spring or other appropriate mechanism may cause the dual flush handle
assembly 1300 to return to the neutral position.
[00119] Turning to FIG. 13F, shown is the dual flush handle assembly 1300 in a
position configured to initiate a full flush of a toilet. The dual flush
handle assembly
1300 may arrive in this position, for example, by a user pressing the first
handle
lever 1303 as indicated by the arrow. By pressing on the first handle lever
1303,
the first handle lever 1303 rotates until the shoulder 1329 of the first
handle lever
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1303 contacts the stop 1363 of the bushing 1309. Thus, the stem 1346 may
rotate
to initiate a full flush of a toilet, for example, via the actuation control
box 113 (FIG.
1).
[00120] As best shown in cut-away view of FIG. 13F, the stop 1363 engages with
the shoulder 1329 of the first handle lever 1306. Thus, the shoulder 1329 in
conjunction with the stop 1363 acts to define the predetermined angle of
rotation.
As shown in FIGS. 13E and 13F, the angle a denotes the angle of rotation that
the
first and second handle levers 1303/1306 have rotated from the neutral
position.
Similarly, the angle 13 shows the angle of rotation that the first handle
lever 1303
has rotated from the neutral position to the full flush position.
[00121] After a full flush has been initiated, the dual flush handle assembly
1300
may automatically return to the neutral position shown in FIG. 13D. To this
end, a
spring or other appropriate mechanism may return the dual flush handle
assembly
1300 to the neutral position. In alternative embodiments, the dual flush
handle
assembly 1300 may return to the neutral position using other mechanisms. As
non-
limiting examples, the dual flush handle assembly 1300 may return to the
neutral
position due its own weight, from a flush valve dropping due to a drop in
water level
in the toilet tank, from a spring force inside the activation control box 113
(FIG. 1),
from a spring force associated with a flush valve, or from any other
mechanism.
[00122] Referring next to FIGS. 14A-14D, shown is another example of a dual
flush handle assembly 1400. The dual flush handle assembly 1400 may be used to
initiate a partial flush and/or a full flush of a toilet. To this end, the
dual flush handle
assembly 1400 may be in communication with, for example, the actuation control
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box 113 (FIG. 1). FIG. 14A shows an exploded view of the dual flush handle
assembly 1400. The dual flush handle assembly 1400 includes a first handle
lever
1403, a second handle lever 1406, a bushing 1409, and other components such
as,
e.g., springs, retaining elements, and/or damper as discussed with respect to
the
dual flush handle assembly 600 of FIGS. 3A-3D.
[00123] The first handle lever 1403 is shaped to be nested within the second
handle lever 1406. In this sense, the first handle lever 1403 and second
handle
lever 1406 are formed to facilitate at least a portion of the first handle
lever 1403
"fitting" within a portion of the second handle lever 1406. The second handle
lever
1406 may fit within a profile of the first handle 1403 so as to promote the
appearance of a single handle. Accordingly, the dual flush handle assembly
1400
may present an appearance of a conventional toilet flush lever, while
providing the
functionality of a dual flush handle control.
[00124] The first handle lever 1403 is configured to rotate about an axis,
which
may be limited to a predetermined angle of rotation by the rotational range
within
the bushing and/or by the actuation control box 113 (FIG. 1). The second
handle
lever 1406 is also configured to rotate about an axis by a predetermined angle
of
rotation. It is emphasized that the second handle lever 1406 may rotate by a
predetermined angle of rotation that is different than the angle of rotation
of the first
handle lever 1403. The second handle lever 1406 includes an extension 1443
that
extends outward from the toilet-facing side or surface of the second handle
lever
1406. The second handle lever 1406 also includes a lip (or tab) 1483 that
engages
with a recess 1486 of the first handle lever 1403. Rotation of the second
handle
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lever 1406 engages the lip 1483 with the recess 1486 to cause corresponding
rotation of the first handle lever 1403. The first handle lever 1403 may be
rotated
without producing a corresponding rotation of the second handle lever 1406.
When
the first handle lever 1403 is rotated, the lip 1483 is disengaged from the
recess
1486, allowing the second handle lever 1406 to remain stationary.
[00125] A stem 1446 is attached to the first handle lever 1403 to extend
outward
from the toilet-facing side or surface of the first handle lever 1403. For
example,
the stem 1446 may be integrally cast with the first handle lever 1403 as
illustrated in
the cut-away view of FIG. 13C. A force applied to the first handle lever 1403
applies torque to the stem 1446. A force applied to the second handle lever
1406
is transferred through the lip 1483 to the first handle lever 1403 to apply a
torque to
the stem 1446.
[00126] A bushing 1409 is configured to extend through an opening in a wall of
a
toilet tank. The bushing 1409 includes a cut-out 1463. The bushing 1409 also
includes a passage, a lip, a rectangular segment, a threaded segment as
discussed
with respect to the example of FIGS. 7A-7F, and possibly other features not
discussed in detail herein. The passage extends longitudinally through the
bushing
1409 and is configured for the stem 1446 to pass at least partially through
the
bushing 1409. The cut-out 1463 includes a slot configured to receive the
extension
1443 of the second handle lever 1406 (similar to cut-out 1163 of FIG. 11A).
The
distal end of the bushing 1409 may also be configured to detachably connect to
the
actuation control box 113 (FIG. 1).
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[00127] The portion of the stem 1446 extending from the first handle lever
1403
includes a stem groove at the distal end. The stem groove is configured to
receive
a retaining element 1426 to facilitate securing the first and second handle
levers
1403/1406 to the bushing 1409. To this end, with the stem groove extending
through the second handle lever 1406 and the passage of the bushing 1409, the
retaining element 1426 may clip to the stem groove to retain the stem 1446
within
the bushing 1409. Thus, the retaining element 1426 may retain the first and
second handle levers 1403/1406 to the bushing 1409 in a lateral position,
while
facilitating rotation of the second handle lever 1406 and/or first handle
lever 1403
with respect to the bushing 1409. The distal end of the stem 1446 can be
configured to detachably engage a cam of the actuation control box 113 (FIGS.
2A-
2C).
[00128] The lip of the bushing 1409 is configured to abut an exterior surface
of a
toilet tank. The rectangular segment is configured to be secured in a
corresponding
opening in the toilet tank wall, thereby preventing rotational movement of the
bushing 1409 with respect to the toilet tank wall. The threaded segment of the
bushing 1409 is configured to receive an appropriately threaded nut that abuts
an
interior surface of the toilet tank wall, thereby preventing translational
movement of
the bushing 1409 with respect to the toilet tank.
[00129] Next, a description of the general operation of the dual flush handle
assembly 1400 is provided. FIGS. 14B, 14C, and 14D show progressions of the
dual flush handle assembly 1400 being in a neutral position, initiating a
partial (or
"quick") flush, and initiating a full flush, respectively.
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[00130] With reference to FIG. 14B, shown is the dual flush handle assembly
1400 in a neutral position according to various embodiments of the present
disclosure. The neutral position shown is the position to which the dual flush
handle assembly 1400 returns after a flush has been initiated. The extension
1443
of the second handle lever 1406 extends into the cut-out 1463 of the bushing
1409.
As best shown in the cut-away view of FIG. 14B, there is a space 1493 between
the
extension 1443 and the lower edge of the cut-out 1463.
[00131] Turning now to FIG. 14C, shown is the dual flush handle assembly 1400
in a position configured to initiate a partial (or "quick") flush of a toilet.
The dual
flush handle assembly 1400 may arrive in this position, for example, by a user
pressing on the second handle lever 1406 as indicated by the arrow. The second
handle lever 1406 pushes against the first handle lever 1403 via the lip 1483
and
recess 1486 causing the first handle lever 1403, and thus the stem 1446, to
rotate.
The rotation of the second handle lever 1406 is limited by the lower edge of
the cut-
out 1463 of the bushing 1409 making contact with the extension 1463 of the
second handle lever 1406. While the second handle lever 1406 stops rotating
when the lower edge of the extension 1443 engages with the cut-out 1463, the
first
handle lever 1403 may continue to rotate. By rotating the second handle lever
1406 by the amount limited by the extension 1443 and cut-out 1463, the stem
1446
rotates a predetermined amount to initiate a partial flush, for example,
through the
actuation control box 113 (FIG. 1) as described above.
[00132] After a partial flush has been initiated, the dual flush handle
assembly
1400 may automatically return to the neutral position shown in FIG. 14B. To
this,
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end, a spring or other appropriate mechanism may cause the dual flush handle
assembly 1400 to return to the neutral position.
[00133] Turning to FIG. 14D, shown is the dual flush handle assembly 1400 in a
position configured to initiate a full flush of a toilet. The dual flush
handle assembly
1400 may arrive in this position, for example, by a user pressing the first
handle
lever 1403 as indicated by the arrow. By pressing on the first handle lever
1403,
the first handle lever 1403 rotates until the bushing 1309 and/or actuation
control
box 113 (FIG. 1) limit rotation. Thus, the stem 1346 may rotate to initiate a
full flush
of a toilet, for example, via the actuation control box 113. As shown in FIGS.
14C
and 14D, the angle a denotes the angle of rotation that the first and second
handle
levers 1403/1406 have rotated from the neutral position. Similarly, the angle
13.
shows the angle of rotation that the first handle lever 1403 has rotated from
the
neutral position to the full flush position.
[00134] After a full flush has been initiated, the dual flush handle assembly
1400
may automatically return to the neutral position shown in FIG. 14B. To this
end, a
spring or other appropriate mechanism may return the dual flush handle
assembly
1400 to the neutral position. In alternative embodiments, the dual flush
handle
assembly 1400 may return to the neutral position using other mechanisms. As
non-
limiting examples, the dual flush handle assembly 1400 may return to the
neutral
position due its own weight, from a flush valve dropping due to a drop in
water level
in the toilet tank, from a spring force inside the activation control box 113
(FIG. 1),
from a spring force associated with a flush valve, or from any other
mechanism.
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[00135] It should be emphasized that the above-described embodiments of the
present disclosure are merely possible examples of implementations set forth
for a
clear understanding of the principles of the disclosure. Many variations and
modifications may be made to the above-described embodiment(s) without
departing substantially from the spirit and principles of the disclosure. All
such
modifications and variations are intended to be included herein within the
scope of
this disclosure and protected by the following claims.
[00136] It is noted that ratios, concentrations, amounts, and other numerical
data
may be expressed herein in a range format. It is to be understood that such a
range format is used for convenience and brevity, and thus, should be
interpreted in
a flexible manner to include not only the numerical values explicitly recited
as the
limits of the range, but also to include all the individual numerical values
or sub-
ranges encompassed within that range as if each numerical value and sub-range
is
explicitly recited. To illustrate, a concentration range of "about 0.1% to
about 5%"
should be interpreted to include not only the explicitly recited concentration
of about
0.1 wt% to about 5 wt%, but also include individual concentrations (e.g., 1%,
2%,
3%, and 4%) and the sub-ranges (e.g., 0.5%, 1.1%, 2.2%, 3.3%, and 4.4%) within
the indicated range. The term "about" can include 1%, 2%, 3%, 4%, 5%,
6%, 7%, 8%, 9%, or 10%, or more of the numerical value(s) being modified.
In addition, the phrase "about 'x' to `y" includes "about 'x' to about 'y".
49
