Note: Descriptions are shown in the official language in which they were submitted.
FURNITURE MEMBER AND POWER RECLINE AND LIFT MECHANISM
[0001] This paragraph left intentionally blank
FIELD
[0002]
The present disclosure relates to a furniture member and power recline
and lift mechanism.
BACKGROUND
[0003]
This section provides background information related to the present
disclosure and is not necessarily prior art.
[0004]
Power lift chairs can provide a motor-operated transition from an
occupant's seated position to a lift position which provides the occupant with
approximately
50 percent or more of a transition from a seated position to a standing
position. Such a
feature may be particularly beneficial for occupants who have difficulty
directly standing from
a fully seated position.
[0005]
Known power lift chair designs can impede placement of the occupant's
feet in a position close to the center of gravity of the occupant and,
therefore, require greater
that necessary leg strength of the occupant to stand even when at a full lift
position of the
chair. In addition, known power lift chair designs have complicated operating
mechanisms
that are expensive to build and therefore result in a high cost of purchase.
Further, known
power lift chair designs do not provide for multiple chair positions or range
of motion that
maximize occupant choice of seating and/or leg rest positions.
SUMMARY
[0006]
This section provides a general summary of the disclosure, and is not a
comprehensive disclosure of its full scope or all of its features.
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[0007] In one form, the
present disclosure provides a furniture member
that may include a frame assembly, a motor, a slide member, a first bar, an
axle,
first and second leg members and a second bar. The frame assembly may
include a chair portion movable relative to a base portion among a nominal
position, a reclined position and a lift position. The motor may be attached
to the
base portion. The slide member may be connected to the motor and
displaceable relative to the base portion in first and second directions by
selective operation of the motor. The first bar may be connected to the slide
member and the chair portion. The first bar may move the chair portion among
the nominal position, the reclined position and the lift position in response
to
operation of the motor. The axle may be rotatably mounted to the base portion.
The first and second leg members may be attached to respective first and
second ends of the axle. Each of the first and second leg members may include
a fore foot and an aft foot. The second bar may be connected to the chair
portion and slidably connected to the axle. The second bar may rotate the axle
in a first direction in response to movement of the chair portion into the
reclined
position. The second bar may rotate the axle in a second direction in response
to movement of the chair portion into the lift position.
[0008] In some embodiments,
the fore feet of the first and second leg
members extend through the base portion in the reclined position so that an
aft
portion of the base and fore feet of the first and second leg members are
supporting a weight of the furniture member with a fore portion of the base
portion spaced apart from a ground surface upon which the furniture member is
situated.
[0009] In some embodiments,
the aft feet of the first and second leg
members extend through the base portion in the lift position so that the fore
portion of the base and aft feet of the first and second leg members are
supporting the weight of the furniture member with the aft portion of the base
portion spaced apart from the ground surface.
[0010] In some embodiments,
the first and second leg members are
generally U-shaped members.
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[0011] In some embodiments, the base portion includes a plurality of
apertures through which the fore and aft feet of the first and second leg
members are extendable.
[0012] In some embodiments, the furniture member includes a legrest
mechanism including a legrest linkage and a legrest member that are moveable
between an extended position and a retracted position independently of
movement of the first and second bars.
[0013] In some embodiments, the legrest mechanism includes a
legrest motor that drivingly engages the legrest linkage.
[0014] In some embodiments, the axle is rotatably supported by
bearing blocks that are fixedly mounted to the base portion.
[0015] In some embodiments, the first and second leg members are
fixedly attached to the axle by first and second brackets, respectively.
[0016] In some embodiments, the second bar includes an elongated
.. slot that slidably receives a peg that is fixedly attached to the axle.
[0017] In some embodiments, the slide connected to the first bar has a
range of motion that is longer than the elongated slot so that the peg slides
along
the elongated slot of the second bar for only a portion of the range of motion
of
the slide.
[0018] In some embodiments, continued motion of the slide in a
rearward direction past a position of the slide corresponding to initial
contact
between the peg and a fore end of the elongated slot causes rotation of the
axle
and the first and second leg members in a first rotational direction relative
to the
base portion.
[0019] In some embodiments, continued motion of the slide in a
forward direction past a position of the slide corresponding to initial
contact
between the peg and an aft end of the elongated slot causes rotation of the
axle
and the first and second leg members in a second rotational direction relative
to
the base portion.
[0020] In some embodiments, the furniture member can be a chair.
[0021] In some embodiments, the furniture member can be a sofa or a
section of a sofa.
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[0022] In some embodiments,
an angle between a seatback of the
chair portion and a seat bottom of the chair portion increases by a
predetermined
amount when the chair portion is moved from the nominal position to the lift
position. The predetermined amount may be approximately five degrees, for
example.
[0023] In another form, the
present disclosure provides a furniture
member that may include a base member, a chair frame, a mechanism, and first
and second leg members. The base member may include fore and aft end
portions. The chair frame may be movable relative to the base member among
a nominal position, a reclined position and a lift position. The mechanism may
move the chair frame relative to the base member among the nominal, reclined
and lift positions. The first and second leg members may each have fore and
aft
feet movably mounted to the base member such that the fore feet extend
through the base member in the reclined position and the aft feet extend
through
the base member in the lift position. The fore and aft end portions of the
base
may support a weight of the furniture member in the nominal position. The fore
feet and the aft end portion may support the weight in the reclined position.
The
aft feet and the fore end portion may support the weight in the lift position.
[0024] In some embodiments,
the mechanism includes a motor
attached to the base member, a slide member connected to the motor, and a
first bar connected to the slide member and the chair frame.
[0025] In some embodiments,
the furniture member includes an axle
rotatably mounted to the base member; and a second bar connected to the chair
frame and slidably connected to the axle. The second bar may rotate the axle
in
a first direction in response to movement of the chair frame into the reclined
position and rotate the axle in a second direction in response to movement of
the
chair frame into the lift position.
[0026] In some embodiments,
the second bar includes an elongated
slot that slidably receives a peg that is fixedly attached to the axle.
[0027] In some embodiments,
the slide connected to the first bar has a
range of motion that is longer than the elongated slot so that the peg slides
along
the elongated slot of the second bar for only a portion of the range of motion
of
the slide member.
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[0028] In some embodiments,
continued motion of the slide member in
a rearward direction past a position of the slide member corresponding to
initial
contact between the peg and a fore end of the elongated slot causes rotation
of
the axle and the first and second leg members in a first rotational direction
relative to the base member.
[0029] In some embodiments,
continued motion of the slide member in
a forward direction past a position of the slide member corresponding to
initial
contact between the peg and an aft end of the elongated slot causes rotation
of
the axle and the first and second leg members in a second rotational direction
relative to the base member.
[0030] In some embodiments,
the axle is rotatably supported by
bearing blocks that are fixedly mounted to the base member.
[0031] In some embodiments,
the first and second leg members are
fixedly attached to the axle by first and second brackets, respectively.
[0032] In some embodiments,
the base member includes a plurality of
apertures through which the fore and aft feet of the first and second leg
members are extendable.
[0033] In some embodiments,
the furniture member includes a legrest
mechanism including a legrest linkage and a legrest member that are moveable
between an extended position and
a retracted position independently of
movement of the first and second leg members.
[0034] In some embodiments,
the legrest mechanism includes a
legrest motor that drivingly engages the legrest linkage.
[0035] In some embodiments,
the first and second leg members are
generally U-shaped members.
[0036] In some embodiments, the furniture member can be a chair.
[0037] In some embodiments,
the furniture member can be a sofa or a
section of a sofa.
[0038] In some embodiments,
an angle between a seatback of the
chair frame and a seat bottom of the chair frame increases by a predetermined
amount when the chair frame is moved from the nominal position to the lift
position. The predetermined amount may be approximately five degrees, for
example.
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[0039] Further areas of
applicability will become apparent from the
description provided herein. The description and specific examples in this
summary are intended for purposes of illustration only and are not intended to
limit the scope of the present disclosure.
DRAWINGS
[0040] The drawings
described herein are for illustrative purposes only
of selected embodiments and not all possible implementations, and are not
intended to limit the scope of the present disclosure.
[0041] Figure 1 is a front
right perspective view of a furniture member
having a power lift mechanism shown in a nominal seating position;
[0042] Figure 2 is the
furniture member of Figure 1 shown in a
maximum lift position;
[0043] Figure 3 is a front
left perspective view of a base portion of the
furniture member of Figure 1 showing the power lift mechanism in an exploded
view;
[0044] Figure 4 is the front
left perspective view of Figure 3 showing
the assembled power lift mechanism;
[0045] Figure 5 is a front
right perspective exploded assembly view of
a chair portion of the furniture member of Figure 1;
[0046] Figure 6 is a right
rear perspective view of the base and chair
portions of Figures 4 and 5 during assembly;
[0047] Figure 7 is a front
right perspective view of the furniture
member of Figure 1 in a forward lift position;
[0048] Figure 8 is a front
right perspective view of the furniture
member of Figure 1 in a rearward tilt and seatback rotated position;
[0049] Figure 9 is a front
right perspective view of the furniture
member of Figure 1 in a leg rest extended position;
[0050] Figure 10 is a front
right perspective view of the furniture
member of Figure 1 in a seatback rotated and leg rest extended position;
[0051] Figure 11 is a front
right perspective view of the furniture
member of Figure 9 in the leg rest extended and further in a forward lift
position;
[0052] Figure 12 is a top
plan view of the furniture member of Figure 1;
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[0053] Figure 13 is a cross
sectional right side elevational view taken
at section 13 of Figure 12;
[0054] Figure 14 is a cross
sectional rear elevational view taken at
section 14 of Figure 12;
[0055] Figure 15 is a left
side elevational view of the furniture member
of Figure 2;
[0056] Figure 16 is a cross
sectional side elevational view of the
furniture member of Figure 2 taken at section 16 of Figure 12;
[0057] Figure 17 is a
partial front left perspective view of the furniture
member of Figure 2;
[0058] Figure 18 is a cross
sectional right side elevational view of the
furniture member of Figure 13 further showing the chair in a rearward tilt
position;
[0059] Figure 19 is a cross
sectional right side elevational view of the
furniture member of Figure 13 further showing the chair in a leg rest fully
extended position;
[0060] Figure 20 is a cross
sectional right side elevational view of the
furniture member of Figure 18 further showing the chair in a seatback fully
reclined position;
[0061] Figure 21 is a cross
sectional right side elevational view of the
furniture member of Figure 20 further showing the chair in a leg rest fully
extended position;
[0062] Figure 22 is a right
side elevational view of another furniture
member (with a right armrest removed) in a nominal position;
[0063] Figure 23 is a
perspective view of a mechanism of the furniture
member of Figure 22 in the nominal position;
[0064] Figure 24 is a right
side elevational view of the furniture
member in a nominal position with a legrest mechanism in an extended position;
[0065] Figure 25 is a right
side elevational view of the furniture
member in a fully reclined position;
[0066] Figure 26 is a
perspective view of the mechanism in the fully
reclined position;
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[0067] Figure 27 is a right
side elevational view of the furniture
member in a full lift position;
[0068] Figure 28 is a
perspective view of the mechanism in the full lift
position; and
[0069] Figure 29 is a
perspective view of an alternative configuration of
a leg member of the furniture member of Figures 22-28.
[0070] Corresponding
reference numerals indicate corresponding parts
throughout the several views of the drawings.
DETAILED DESCRIPTION
[0071] Example embodiments
will now be described more fully with
reference to the accompanying drawings.
[0072] Referring to Figure
1, a lift chair 10 includes a rotatable frame
assembly 12 having a seat back assembly 14 rotatably connected to frame
assembly 12, and a leg rest member 16 connected to and extendable/retractable
with respect to frame assembly 12. The frame assembly 12 includes a base
portion 18 which is positioned interior to and rotatable with respect to a
chair
portion 20. For clarity, lift chair 10 is not shown with seat support springs,
padding, or upholstery which are commonly applied to lift chairs as known in
the
art. The lift chair 10 is supported on a floor or planar surface using a
square or
rectangular shaped base platform 22 which according to several embodiments is
included with base portion 18. The chair portion 20 further includes each of a
first arm rest portion 24, corresponding to a right side of an occupant seated
in
lift chair 10, and a second arm rest portion 26, corresponding to a left side
of the
seated occupant. Lift chair 10 also includes several components which are
movably displaced using a mechanism 28. Mechanism 28 independently or in
combination controls: forward and rearward rotational displacement of seat
back
assembly 14; extension/retraction of the leg rest member 16 between a stowed
position shown to an outward extended position, which is shown and described
in reference to Figures 9 and 10; and rotation of the chair portion 20
upwardly
and downwardly with respect to the base portion 18 to provide multiple
occupant
seating positions and a full lift position.
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[0073] Referring to Figure 2
and again to Figure 1, lift chair 10 is
shown following an upward/forward rotation from the nominal seating position
of
Figure 1 to a maximum lift position which accommodates user exit or entrance
from/to the lift chair 10. To rotate lift chair 10 from the nominal seating
position
defined as a seat back fully upright and leg rest stowed position (shown in
Figure
1) to the lift position (shown in Figure 2), a lift mechanism portion 30 of
mechanism 28 is actuated by the occupant, causing lift and rotation of chair
portion 20 with respect to a frame rotational axis 32 which rotates chair
portion
20 in a lift rotational direction "A". In the full lift position shown, the
seat back
assembly 14 is positioned in the fully upright position and leg rest member 16
is
positioned in its stowed position. The mechanism 28 further includes a leg
rest
mechanism portion 34 which will be described in greater detail in reference to
Figure 5, which is not operational during the rotation of chair portion 20 to
the full
lift position. As also visible in Figure 2, the chair portion 20 further
includes a
first inner arm rest member 36 positioned to the occupant's right hand side
and a
second inner arm rest member 38 positioned to the occupant's left hand side,
which are nested between a first base frame member 40 and a second base
frame member 42.
[0074] Referring to Figure 3
and again to Figure 1, components of the
lift mechanism portion 30 of mechanism 28 are positioned in a cavity defined
between the first and second base frame members 40, 42. The first base frame
member 40 is positioned proximate to a base platform first edge 44 of base
platform 22, and second base frame member 42 is positioned proximate to a
base platform second edge 46 of base platform 22. Each of the first and second
base frame members 40, 42 are oriented parallel with respect to each other and
substantially perpendicular to base platform 22. A third base frame member 48,
defining a rear facing wall of base portion 18, is positioned proximate to a
base
platform third edge 50 of base platform 22. A plurality of feet 51 are
adjustably
connected to base platform 22 at each of a plurality of feet positioning
apertures
52. Feet 51 allow for ensuring contact and equal support of the four corners
of
base platform 22.
[0075] Each of the first and
second base frame members 40, 42 are
provided with an intersecting corner 53 where a frame member forward edge 54
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of each of the first and second base frame members 40, 42 intersects with base
platform 22. The intersecting corner 53 of each of the first and second base
frame members 40, 42 is spatially and rearwardly positioned with respect to a
base platform forward edge 55 of base platform 22. According to several
aspects, first base frame member 40 includes a first receiving face 56 which
is
oriented parallel with respect to an upper face 58 of base platform 22. The
first
receiving face 56 is positioned proximate to the frame member forward edge 54
of first base frame member 40. A second receiving face 60 is similarly
provided
with second base frame member 42, which is oriented parallel with respect to
upper face 58 and co-planar with respect to first receiving face 56. A first
receiving slot 62, having a generally U-shape, is created downwardly with
respect to the first receiving face 56. The first receiving slot 62 receives a
first U-
shaped journal 64 which is sized to be slidably received in first receiving
slot 62
in a downward direction. The first U-shaped journal 64 is integrally included
with
a first connection member 66 which can be combined as a unitary molded plastic
component. Once the first U-shaped journal 64 is received in the first
receiving
slot 62, connection member fasteners 68 are inserted from the outer side or
face
of first base frame member 40 and are received in threaded apertures of first
connection member 66 to fix the location of first connection member 66.
[0076] A second U-shaped journal 70 of a second connection member
72, defining either a duplicate of or a mirror image of first connection
member 66,
is similarly positioned in a U-shaped second receiving slot created in second
receiving face 60 of second base frame member 42. Second connection
member 72 is shown in its installed position. In the installed position of
both first
and second connection members 66, 72, an upper edge 74 of both members is
positioned substantially flush with or slightly above the first or second
receiving
face 56, 60. In addition, the upper edge 74 of both first U-shaped journal 64
and
second U-shaped journal 70 may extend partially into the U-shaped slot defined
by the U-shaped journal 64, 70. The purpose for this extension will be better
described in reference to Figure 6.
[0077] The frame member
forward edge 54 of each of the first and
second base frame members 40, 42 defines an acute angle a with respect to a
plane defined by upper face 58 of base platform 22. The purpose of angle a
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be better described in reference to Figure 16. It is noted that intersecting
corner
53 is recessed rearwardly with respect to base platform forward edge 55 to
create angle a.
[0078] With continuing
reference to Figure 3 and again to Figure 1, lift
mechanism portion 30 includes a lift motor 76 which according to several
aspects is a direct current (DC) motor. A mounting bracket 78 is connected to
a
forward directed face 80 of third base frame member 48 and also to upper face
58 of base platform 22. Mounting bracket 78 includes coaxial through apertures
82, only one of which is clearly visible in Figure 3, which slidably receive
an
assembly mount pin 84 to connect an assembly, including lift motor 76 and a
gear housing 86 directly connected to lift motor 76, which includes internal
gears
(not shown) which drive and are directly connected to an internal worm gear
(not
shown) of a worm drive assembly 88. It is noted that throughout this
disclosure
the description of a "worm drive" device or gear is not limiting and can be
replaced by other drive devices or gears as are known in the art.
[0079] Operation of lift
motor 76 slidably displaces a worm gear slide
90 which is slidably disposed on and displaced during operation of the worm
gear of worm drive assembly 88 in each of a slide lifting direction "B" or
oppositely in a slide returning direction "C". An assembly end 92 of worm
drive
assembly 88 is connected to upper face 58 of base platform 22 using an
assembly end bracket 94. Positioned on opposite sides of worm drive assembly
88 are triangularly shaped first and second guide members 96, 98. According to
several aspects, first and second guide members 96, 98 are molded plastic
components; however, alternate materials can also be used. First guide
member 96 includes a first elongated slot 100, and second guide member 98
includes a second elongated slot 102, both located proximate to an upper wall
or
edge 103, 103' of first and second guide members 96, 98. Elongated slots 100,
102 are oriented substantially in parallel axial alignment with each other in
the
installed positions of the first and second guide members 96, 98. Each of the
first and second guide members 96, 98 also includes a low elevation end 104
oriented toward the forward or front facing portion of base portion 18 and a
high
elevation end 106 oriented toward third base frame member 48 or a rear facing
end of base portion 18. The elongated slots 100, 102 therefore have a
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continuous rearward to frontward downward pitch or angle with respect to upper
face 58. Each of the first and second guide members 96, 98 also includes a
planar support face 108 which rests on and is fastened to the upper face 58 of
base platform 22.
[0080] Lift mechanism
portion 30 further includes a rectangular and
hollow metal lift bar or tube 110. The lift bar 110 may be a generally L-
shaped
bar including a substantially straight first tube portion 112 and a second
tube
portion 114 which is angularly oriented with respect to first tube portion
112. The
lift bar 110 is connected to, and therefore displaces during the sliding
motion of
worm gear slide 90. A combined weight of a substantial portion of chair
portion
plus a substantial portion of a weight of the occupant are distributed by lift
bar
110 to worm gear slide 90 and thereby to each of the first and second guide
members 96, 98 such that bending does not occur within the length of worm
drive assembly 88.
15 [0081] To provide
a sliding connection between the worm gear slide 90
and each of the first and second guide members 96, 98, two shoulder bolts are
provided. A first shoulder bolt 116 includes a bolt head 118, a bolt sleeve
120,
and a bolt threaded shank 122 positioned opposite to bolt head 118. During
assembly, the bolt threaded shank 122 and bolt sleeve 120 of first shoulder
bolt
20 116 are
disposed through elongated slot 100 of first guide member 96. A tube
connecting end 124 of lift bar 110 is positioned between a first inside face
126 of
first guide member 96 and a first slide face 128 of worm gear slide 90. After
the
bolt threaded shank 122 and bolt sleeve 120 of first shoulder bolt 116 extend
through elongated slot 100, they are slidably disposed through a tube through
aperture 130 created in the tube connecting end 124. Bolt threaded shank 122
extends out of tube through aperture 130 and is threadably engaged in a first
threaded bore 132 created in the first slide face 128 of worm gear slide 90.
Different portions of bolt sleeve 120 are slidably received in elongated slot
100
and rotatably received in the tube through aperture 130, therefore allowing
sliding motion of worm gear slide 90 as well as rotation of lift bar 110 with
respect to a central axis of first shoulder bolt 116. The sliding contact of
first
shoulder bolt 116 with walls of first elongated slot 100 therefore distributes
half
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the weight received at worm gear slide 90 to first guide member 96 and base
platform 22 at any sliding position of worm gear slide 90.
[0082] The lift bar 110 is
also connected to second guide member 98
in the following manner. An offset flange 134 is fastenably engaged to the
tube
connecting end 124 using bracket fasteners 136. The offset flange 134 is
integrally connected to a connection bracket 138. Connection bracket 138 is
substantially planar such that connection bracket 138 can rest on a plurality
of
ribs defining a slide surface 140 of worm gear slide 90. A transverse flange
142
is oriented transverse to and integrally connected to connection bracket 138,
and
contacts a second slide face 144 of worm gear slide 90 which is oriented
parallel
to, but oppositely facing with respect to first slide face 128. A transverse
flange
aperture 146 of transverse flange 142 is positioned proximate to a bushing 148
that is disposed between transverse flange 142 and a second inside face 150 of
second guide member 98. Bushing 148 has a length which corresponds
approximately with a width of lift bar 110, thereby spacing first and second
guide
members 96, 98 substantially equally about and with respect to worm drive
assembly 88. A bushing bore 152 of bushing 148 is coaxially aligned with
transverse flange aperture 146 and a second shoulder bolt 154 is assembled
similar to first shoulder bolt 116 by extending second shoulder bolt 154
through
the elongated slot 102, the bushing bore 152, the transverse flange aperture
146, and a threaded aperture (not visible in this view) created in the second
slide
face 144 of worm gear slide 90. The second shoulder bolt 154 therefore
similarly provides sliding support for half the weight distributed through
worm
gear slide 90 to second guide member 98 and thereby to base platform 22.
[0083] Referring to Figure 4
and again to Figures 1-3, base portion 18
is shown following the completed assembly of lift mechanism portion 30. In the
assembled condition shown, the worm gear slide 90 is positioned in a neutral
or
nominal position which provides a basic seating position for the occupant of
lift
chair 10. By subsequent operation of lift motor 76, gear housing 86 and worm
drive assembly 88, worm gear slide 90 can be slidably disposed in the slide
lifting direction "B" to rearwardly and upwardly displace lift bar 110,
establishing
the lift chair full lift position shown with respect to Figure 2. The
occupant's
weight, transferred via lift bar 110 to worm gear slide 90, is distributed to
each of
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the first and second guide members 96, 98 by the first and second shoulder
bolts
116, 154. In the nominal position of worm gear slide 90, the first and second
shoulder bolts 116, 154 are positioned approximately two thirds along a length
of
elongated slots 100, 102 looking forward with respect to lift motor 76. Also,
in
the nominal position of worm gear slide 90, the connection bracket 138 lays
substantially flat with respect to worm gear slide 90. In the completed
assembly
position of base portion 18, the first and second U-shaped journals 64, 70 are
fixed in place, and base portion 18 is therefore ready to receive chair
portion 20
as will be described in reference to Figure 6.
[0084] Referring to Figure 5
and again to Figure 1, the chair portion 20
is assembled as follows. First and second chair frame members 156, 158 are
positioned substantially parallel with respect to each other. A chair frame
structural tube 160 is fixed to rearward ends of each of the first and second
chair
frame members 156, 158 to provide a predetermined frame spacing. A chair
frame front connecting member 162 connects forward ends of the first and
second chair frame members 156, 158. The leg rest mechanism portion 34 is
positioned between and supported by the chair frame structural tube 160 and
the
chair frame front connecting member 162.
[0085] The leg rest
mechanism portion 34 includes a leg rest drive
motor 164 which according to several aspects is a DC motor. The leg rest drive
motor 164 is connected to a drive connecting member 166 which is used to
rotate a drive rod 168 using a drive rod connecting member 170. A support
shaft
172 is positioned in parallel with drive rod 168 and includes portions which
extend outwardly via apertures 173, 173' created in each of the first and
second
chair frame members 156, 158. The extending portions will be described in
better detail in reference to Figure 6. First and second pantograph linkage
sets
174, 176 are each connected to the drive rod 168 and the support shaft 172.
Operation of the leg rest drive motor 164 causes extension of the drive rod
connecting member 170 which axially rotates drive rod 168. Rotation of drive
rod 168 acts to extend or retract each of the first and second pantograph
linkage
sets 174, 176. The first pantograph linkage set 174 extends through a first
clearance opening 178 created in chair frame front connecting member 162.
Similarly, the second pantograph linkage set 176 extends through a second
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clearance opening 180 of chair frame front connecting member 162. Each of the
first and second pantograph linkage sets 174, 176 are connected to the leg
rest
member 16. Extension or retraction of the first and second pantograph linkage
sets 174, 176 therefore extends or retracts the leg rest member 16.
[0086] With continuing
reference to Figure 5, chair portion 20 further
includes a seat frame 182 which is supported in part on first and second swing
assemblies 184, 186 which are rotatably connected to a tube assembly 188. A
first rear swing assembly 190 is also connected to tube assembly 188 and a
first
back bracket assembly 192 is connected to first rear swing assembly 190.
Similarly, a second rear swing assembly 194 is also connected to tube assembly
188 and a second back bracket assembly 196 is connected to the second rear
swing assembly 194. The first and second back bracket assemblies 192, 196
are used to releasably connect the seat back assembly 14. Rotation of the tube
assembly 188 with respect to first and second rear swing assemblies 190, 194
displaces the first and second swing assemblies 184, 186, which displace the
seat frame 182 either forwardly or rearwardly.
[0087] Referring to Figure 6
and again to Figures 1-5, frame assembly
12 is assembled by inserting the assembled chair portion 20 into the assembled
base portion 18 by loading the chair portion 20 in a downward installation
direction "D" until a first shaft extension portion 198 and a second shaft
extension portion 199 (shown in phantom in Figure 6), which are integral,
extending portions of support shaft 172, are received in the individual first
and
second U-shaped journals 64, 70 (only first U-shaped journal 64 is clearly
visible
in this view). By downwardly pressing the first and second shaft extension
portions 198, 199 past the upper edges 74 which extend partially into the
first
and second U-shaped journals 64, 70 providing a clearance less than a diameter
of the first and second shaft extension portions 198, 199, the first and
second
shaft extension portions 198, 199 will snap into position within first and
second
U-shaped journals 64, 70, defining a frictional snap fit, and thereafter the
upper
edge 74 resists removal of the shaft extension portions 198, 199. A material
of
the U-shaped journals 64, 70 is selected to provide a low coefficient of
friction
and, as such, can be a polyamide or a polytetraflouroethylene material or
similar
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polymeric material to provide minimal resistance to rotation of chair portion
20
with respect to base portion 18.
[0088] To assemble the chair
portion 20 to the base portion 18, after
the chair portion 20 is received within base portion 18, the first shaft
extension
portions 198, 199 are individually and sequentially (in any order) snapped in
the
individual first and second U-shaped journals 64, 70. The second tube portion
114 of lift bar 110 is then positioned in a clevis 200 fixed to the tube
assembly
188. A clevis through aperture of an insulating bushing 202 receives a tube
mounting pin 204 which is also extended through a second tube aperture 206
created in second tube portion 114 such that second tube portion 114 is
rotatably connected to the clevis 200. Tube mounting pin 204 can be retained
after insertion using a standard hairpin clip (not shown). Although additional
structural members can be used to connect first and second chair frame
members 156, 158, the third base frame member 48 of base portion 18
substantially provides a rear wall when the chair portion 20 is received in
base
portion 18. A motor control fob 208 is then connected to the mechanism 28 for
selective operation by the occupant in directing operation of either or both
the lift
mechanism portion 30 and/or leg rest mechanism portion 34. At this time, the
leg rest member 16 is free to extend in a forward direction by operation of
the leg
rest mechanism portion 34.
[0089] Referring to Figure 7
and again to Figure 1, lift chair 10 can be
moved from the nominal position shown in Figure 1 to a forward lift position
shown in Figure 7 by operation of the lift mechanism portion 30 which causes a
forward rotation of chair portion 20 with respect to frame rotational axis 32.
Each
of the first and second arm rest portions 24, 26 includes an arm rest outer
frame
210 having a first frame lower face 212 at a rearward end of arm rest outer
frame
210 and a second frame lower face 214 positioned toward a forward end of arm
rest outer frame 210. The first frame lower face 212 is oriented at an angle
with
respect to second frame lower face 214. As the chair portion 20 is rotated in
the
lift rotational direction "A", the second frame lower face 214 is brought into
parallel alignment with base platform 22, and the first frame lower face 212
is
raised with respect to the base platform third edge 50. In this forward lift
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position, the seat back assembly 14 is in its upright position, and the leg
rest
member 16 is in its stowed position.
[0090] Referring to Figure 8
and again to FIGS. 1 and 7, lift chair 10
can also be positioned in a rearward tilt position by operation of lift
mechanism
portion 30. As chair portion 20 is rotated in a chair downward rotational
direction
"E" with respect to frame rotational axis 32, the first frame lower face 212
is
brought into parallel alignment with base platform 22, and the second frame
lower face 214 is raised with respect to base platform 22. By further
operation of
lift mechanism portion 30, seat back assembly 14 is rotated in a seat back
reclining direction "F", which directly results in a forward displacement of
the seat
frame 182 in a seat frame extending direction "G". The forward displacement of
seat frame 182 is caused by rotation/displacement of the tube assembly 188
during operation of lift mechanism portion 30. At this time, the leg rest
member
16 is still in its stowed position. Operation of the leg rest mechanism
portion 34
is therefore not required to reach the lift chair rearward tilt and seat back
assembly rearward reclined positions shown.
[0091] Referring to Figure 9
and again to FIGS. 1, 3, and 7-8, from the
nominal position of lift chair shown in Figure 1 with the seat back assembly
14 in
the fully upright position, the leg rest member 16 can be extended by
operation
of leg rest mechanism portion 34. Operation of leg rest drive motor 164 causes
extension of the first and second pantograph linkage sets 174, 176 (only first
pantograph linkage set 174 is shown for clarity). The leg rest member 16 can
be
extended without repositioning seat frame 182.
[0092] Referring to Figure
10 and again to Figure 9, with the leg rest
member 16 in the fully extended position, additional operation of lift
mechanism
portion 30 can be used to rotate the seat back assembly 14 from the fully
upright
to the seat back reclined position in the seat back reclining direction "F".
In this
position, seat back assembly 14 is fully rotated in the seat back reclining
direction "F", the seat frame 182 is extended forwardly, and leg rest member
16
is fully extended.
[0093] Referring to Figure
11 and again to Figure 7, with lift chair 10
already positioned in the forward lift position, the leg rest member 16 can be
extended by operation of leg rest mechanism portion 34 either before or after
17
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rotation of chair portion 20 in the lift rotational direction "A" to the
forward lift
position. Again, in the forward lift position, the second frame lower face 214
of
arm rest outer frames 210 are oriented substantially parallel or in direct
contact
with base platform 22, and the first frame lower face 212 is elevated with
respect
to base platform 22. From this position, either the chair portion 20 can be
returned to the nominal position shown in Figure 1 before the return of leg
rest
member 16 to the stowed position, or leg rest member 16 can be returned to the
stowed position before chair portion 20 is returned to the nominal position.
[0094] Referring to Figure
12 and again to Figures 1 and 3, in the lift
chair nominal position, the occupant seated on seat frame 182 has his or her
weight distributed substantially onto worm gear slide 90 and thereby to each
of
the first and second guide members 96, 98. During operation of lift mechanism
portion 30 in either of the slide lifting direction "B" or slide returning
direction "C",
the weight of the occupant remains substantially supported over worm gear
slide
90 by distribution of the weight via lift bar 110.
[0095] Referring to Figure
13 and again to Figures 1, 3, 5 and 12, in
the lift chair nominal position with the seat back assembly 14 in the fully
upright
position and the leg rest member 16 in the stowed position, a chair frame rear
wall/connecting member 216 of chair portion 20 extends below and rearwardly of
third base frame member 48. A frame member lower end 218 of chair frame
rear connecting member 216 is positioned substantially below an upper end 220
of the third base frame member 48. Also, as previously noted, in the nominal
lift
chair seating position the first shoulder bolt 116 (and second shoulder bolt
154,
not visible in this view) is positioned substantially two thirds of the length
of
elongated slot 100 with respect to a rear-to-front orientation of elongated
slot
100. The chair portion defines a four-sided wood structure, including: the
first
and second chair frame members 156, 158 oriented parallel to each other; the
rear wall member 216 connected to and oriented perpendicular to the first and
second chair frame members 156, 158; and the front wall member 162
connected to and oriented perpendicular to the first and second chair frame
members 156, 158. The base portion 18 also defines a four-sided wood
structure, including: the first and second base frame members 40, 42 oriented
parallel to each other; the rectangular shaped base platform 22 oriented
18
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perpendicular to the first and second base frame members 40, 42; and the third
base frame member 48 defining the rear facing wall of the base portion 18.
[0096] Referring to Figure
14 and again to Figure 13, a first portion of
the weight of the occupant of lift chair 10 is partially distributed by the
first and
second shaft extension portions 198, 199 of support shaft 172 to each of the
first
and second base frame members 40, 42. A second portion of the occupant
weight is distributed, as previously described herein, via tube assembly 188
and
lift bar 110, to the components of lift mechanism portion 30 and thereby to
base
platform 22. As evident in Figure 14, the first base frame member 40 is
positioned in a cavity between first inner arm rest member 36 and arm rest
outer
frame 210 of first arm rest portion 24. Similarly, the second base frame
member
42 is positioned in a cavity between second inner arm rest member 38 and an
arm rest outer frame 211 (similar to arm rest outer frame 210) of second arm
rest
portion 26.
[0097] Referring to Figure
15 and again to Figure 2, when lift chair 10
is positioned at the maximum lift position by rotation of chair portion 20
about
frame rotational axis 32, a lower end 222 of leg rest member 16 is still
provided
with clearance to base platform 22. It is noted again that the full lift
position for
lift chair 10 is achieved only with leg rest member 16 in the fully stowed
position.
[0098] Referring to Figure
16 and again to Figures 3 and 15, the
orientation of the frame member forward edge 54 of both the first and second
base frame members 40, 42 at angle a and the rearward positioning of the
intersecting corner 53 with respect to frame member forward edge 54 provides
additional clearance for the occupant's feet to be moved rearward to a
position
which is closer to the center of gravity of the occupant to aid in standing up
from
the lift chair full lift position. At the full lift position, second shoulder
bolt 154 is
positioned at a fully rearward end of elongated slot 102 and can be in direct
contact with a slot rear end wall 224 of elongated slot 102. The first
shoulder
bolt 116 (not visible in this view) is similarly positioned with respect to
first
elongated slot 100. The lift bar 110 is therefore providing maximum extension
height at clevis 200. At the maximum extension height, a vertical plane 226
defined at a forward edge 228 of seat frame 182 is oriented perpendicular with
respect to a floor surface 230. The spacing between vertical plane 226 and
base
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platform forward edge 55 provides additional space for the feet of the
occupant
to be positioned rearward of vertical plane 226 and therefore closer to a
center of
gravity of the occupant than known lift chairs. This enhances the ability of
the
occupant to stand and exit lift chair 10.
[0099] Referring to Figure 17 and again to Figures 3 and 4, most of the
structural components of lift chair 10 have been removed for clarity such that
the
right hand components for operation of leg rest member 16 are shown, and the
components of lift mechanism portion 30 are visible when left chair is in the
maximum lift position. The leg rest drive motor 164 is not operated during the
.. rotation to the lift chair full lift position. The drive rod connecting
member 170 is
therefore in its fully retracted position as is first pantograph linkage set
174. As
worm gear slide 90 is displaced in the slide lifting direction "B", which is
rearward
with respect to the occupant of lift chair 10, the connection bracket 138 as
well
as lift bar 110 rotate such that second tube portion 114 connected to clevis
200
provides maximum lift to the tube assembly 188. As worm gear slide 90 moves
in the slide lifting direction "B", the shoulder bolts, such as second
shoulder bolt
154 shown, slide within the elongated slots, such as elongated slot 102 shown,
toward the high elevation end 106 of the first and second guide members 96,
98.
The rearward displacement of worm gear slide 90, as well as the increased
elevation of the shoulder bolts, provides the maximum lift position. When the
shoulder bolts 116, 154 reach the slot rear end wall 224 of each of the
respective
first and second elongated slots 100, 102, the maximum lift position is
reached.
Lift chair 10 will remain at the full lift position until the occupant
redirects
operation of lift motor 76 to return lift chair 10 to the nominal position
shown in
Figure 1 or to any of the other operating positions described herein.
[00100] Referring to Figure 18 and again to Figure 8, in the chair
rearward tilt position provided by operation of lift mechanism portion 30,
chair
portion 20 is rotated in the chair downward rotational direction "E" until the
first
frame lower face 212 is parallel with or in contact with upper face 58 of base
platform 22. The chair rearward tilt position, having seat back assembly 14 in
its
furthest upright position, results in a lowest position for lift bar 110 with
respect to
base platform 22. During the transition toward the chair rearward tilt
position, the
shoulder bolts 116, 154 displace in the first and second elongated slots 100,
102
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in the slide returning direction "C", moving toward a slot forward end wall
232. At
the chair rearward tilt position, the frame member lower end 218 of chair
frame
rear connecting member 216 is at its lowest elevation position and positioned
proximate to base platform 22.
[00101] Referring to Figure 19 and again to Figure 9, in the chair upright
leg rest extended position of lift chair 10, the leg rest mechanism portion 34
is
operated such that an extending drive shaft 234, extended by operation of leg
rest drive motor 164 from drive connecting member 166, displaces drive rod
connecting member 170 and thereby rotates drive rod 168. Rotation of drive rod
168, as previously described, extends leg rest member 16 to the fully extended
position. Lift bar 100 and the shoulder bolts 116, 154, such as first shoulder
bolt
116 shown, are in positions corresponding to the nominal position of lift
chair 10
shown in Figure 1. The only operation required to extend leg rest member 16 is
therefore operation of the leg rest mechanism portion 34 by operation of leg
rest
drive motor 164.
[00102] Referring to Figure 20 and again to Figure 18, to change from
the chair rearward tilt position shown in Figure 18 to further achieve the
maximum seat back assembly 14 rearward rotation in the seat back reclining
direction "F", lift mechanism portion 30 is operated to displace worm gear
slide
90 in the slide returning direction "C" further forward than its position in
the
nominal position of lift chair 10. Worm gear slide 90 therefore moves in the
slide
returning direction "C" until the shoulder bolts 116, 154, such as first
shoulder
bolt 116 shown, contact the slot forward end wall 232 of the first and second
elongated slots 100, 102. At this position, lift bar 110 is elevated compared
to
the chair rearward tilt position shown in Figure 18, which allows the full
rearward
rotation of seat back assembly 14 and forward displacement of seat frame 182
in
the seat frame extending direction "G". Again, a maximum chair rearward tilt
position can be achieved while the leg rest member 16 is in its fully stowed
position.
[00103] Referring to Figure 21 and again to Figure 20, to change from
the maximum chair rearward tilt position shown in Figure 20 to further include
the
full extension of leg rest member 16, when the operation of lift mechanism
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portion 30 is completed, leg rest mechanism portion 34 can be further operated
to extend leg rest member 16 to its fully extended position shown.
[00104] With reference to Figures 22-28, another furniture member 500
is provided. The structure and function of the furniture member 500 may be
similar or identical to that of the lift chair 10 described above, apart from
any
exceptions noted below. Therefore, similar features will not be described in
detail.
[00105] Briefly, the furniture member 500 may include a base portion
518 and a chair portion 520 that is rotatably mounted to the base portion 518.
A
lift/recline mechanism 530 is mounted to a base platform 522 of the base
portion
518 and is operable to move the chair portion 520 and the base portion 518
among a nominal position (Figure 22), a "zero-gravity tilt position" or a
fully
reclined position (Figure 25) and a fully lifted position (Figure 27). It will
be
appreciated that the lift/recline mechanism 530 can move the base portion 518
and the chair portion 520 to any position between the reclined and lift
positions.
A legrest mechanism 534 is coupled to the chair portion 520 and a legrest
member 516 and is operable to move the legrest member 516 relative to the
base portion 518 and the chair portion 520 between a retracted position
(Figures
22 and 27) and an extended position (Figures 24 and 25). The legrest
mechanism 534 may be operable independently of the lift/recline mechanism
530. The structure and function of the legrest mechanism 534 may be similar or
identical to that of the legrest mechanism 34 described above, and therefore,
will
not be described again in detail.
[00106] The structure and function of the lift/recline mechanism 530
may be similar to that of the mechanism 30 described above, apart from any
exceptions described herein and/or shown in the figures. Therefore, similar
features will not be described again in detail. Like the mechanism 30, the
mechanism 530 may include the motor 76, the worm drive assembly 88, the first
and second guide members 96, 98, and the lift bar 110 (shown in Figure 23). As
described above, operation of the motor 76 causes the slide 90 to move along
the worm assembly 88 and the first and second guide members 96, 98. As
described above, a first end of the lift bar 110 is coupled to the slide 90
and a
22
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second end of the lift bar 110 is coupled to the tube assembly 188, which in
turn,
is coupled to the chair portion 520.
[00107] As shown in Figure 23, the lift/recline mechanism 530 also
includes an axle 540, first and second legs 542, 544, and a generally L-shaped
extension bar 546. The axle 540 is rotatably supported by a pair of bearing
blocks 548 that are fixedly mounted to the base platform 522. A first end 550
of
the axle 540 may be fixedly mounted to the first leg 542 by a bracket 552. A
second end 554 of the axle 540 may be fixedly mounted to the second leg 44 by
another bracket 552. In this manner, the axle and the first and second legs
542,
544 are rotatable with each other relative to the base portion 518 and the
chair
portion 520 (see Figures 22, 25 and 27).
[00108] The first and second legs 542, 544 may be generally U-shaped
members that each includes a fore foot 556 and an aft foot 558. The base
platform 522 may include a plurality of apertures 560 each of which are
generally
aligned with a corresponding one of the feet 556, 558 of the first and second
legs
542, 544. As shown in Figures 23, 26 and 28, the apertures 560 allow the feet
556, 558 to extend through the base platform 522, as will be described in more
detail below.
[00109] Figure 29 depicts an alternative configuration of the legs 542,
544. The configuration shown in Figure 29 may be a molded plastic, metal or
composite component, rather than a tubular metal, plastic or composite
component. The configuration shown in Figure 29 attaches to the mechanism
530 in the same way as the configuration shown in Figures 22-28 and also
functions in the same way.
[00110] As shown in Figure 23, another bracket 562 is fixedly attached
to the axle 540 between the first end 550 and the first guide member 96. The
bracket 562 includes first and second members 564, 566 that engage a peg or
pin 568. A first portion 570 of the extension bar 546 is disposed between the
first and second members 564, 566 and includes an elongated slot 572 that
slidably receives the pin 568 so that the extension bar 546 can slide relative
to
the bracket 562 and axle 540. As shown in Figure 23, the slot 572 can be
formed in a block 574 fixedly mounted to the extension bar 546, or the slot
572
can be formed in an integrally formed portion of the extension bar 546. A
length
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of the slot 572 is shorter than the lengths of the first and second slots 100,
102 of
the first and second guide members 96, 98. A second portion 576 of the
extension bar 546 may be pivotably coupled to the tube assembly 188.
[00111] With continued reference to Figures 22-28, operation of the
mechanism 530 will be described in detail. As described above, the mechanism
530 moves the base portion 518 and the chair portion 520 among the nominal
position (Figure 22), the reclined position (Figure 25) and the lifted
position
(Figure 27). In the nominal position, fore and aft portions 580, 582 of the
base
platform 522 may contact a flat ground surface 584 upon which the furniture
member 500 is situated and support the entire weight of the furniture member
500. In some configurations, the fore and aft feet 556, 558 of the first and
second legs 542, 544 may contact the ground surface 584 and support the entire
weight of the furniture member 500 in the nominal position. In the reclined
position, the fore feet 556 of the first and second legs 542 and the aft
portion 582
of the base platform 522 may contact the ground surface 584 and support the
entire weight of the furniture member 500. In the lifted position, the aft
feet 558
of the first and second legs 542 and the fore portion 580 of the base platform
522 may contact the ground surface 584 and support the entire weight of the
furniture member 500.
[00112] When the mechanism 530 moves from the nominal position
(Figures 22 and 23) to the reclined position (Figures 25 and 26), operation of
the
motor 76 in a first direction causes the slide 90 to move along the worm drive
assembly 88 and the first and second guide members 96, 98 toward the forward-
most position (as shown in Figure 26). Because the lift bar 110 is connected
to
the slide 90 and the chair portion 520, this movement of the slide 90 toward
the
forward-most position causes the chair portion 520 to move toward the reclined
position. As the slide 90 moves toward the forward-most position, the pin 568
of
the bracket 562 of the axle 540 slides relative to the slot 572 of the
extension bar
546 until the pin 568 contacts the rearward-most end of the slot 572 (as shown
in
Figure 26). While the pin 568 is sliding relative to the slot 572, the axle
540
remains stationary relative to the base platform 522. Once the pin 568
contacts
the rearward-most end of the slot 572, continued movement of the slide 90
toward the forward-most position causes the extension bar 546 to rotate the
axle
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540 and the legs 542, 544 in a first rotational direction so that the fore
feet 556 of
the legs 542, 544 protrude through the corresponding apertures 560 in the base
platform 522 (as shown in Figures 25 and 26). As the fore feet 556 extend
further through the apertures 560, the fore portion 580 of the base platform
522
is lifted off of the ground 584 to further recline the furniture member 500 to
the
fully reclined position shown in Figure 25.
[00113] When the mechanism 530 moves from the nominal position
(Figures 22 and 23) to the lifted position (Figures 27 and 28), operation of
the
motor 76 in a second direction (opposite the first direction) causes the slide
90 to
move along the worm drive assembly 88 and the first and second guide
members 96, 98 toward the rearward-most position (as shown in Figure 28).
Because the lift bar 110 is connected to the slide 90 and the chair portion
520,
this movement of the slide 90 toward the rearward-most position causes the
chair portion 520 to move toward the lifted position. As the slide 90 moves
toward the rearward-most position, the pin 568 of the bracket 562 of the axle
540
slides relative to the slot 572 of the extension bar 546 until the pin 568
contacts
the forward-most end of the slot 572 (as shown in Figure 28). While the pin
568
is sliding relative to the slot 572, the axle 540 remains stationary relative
to the
base platform 522. Once the pin 568 contacts the forward-most end of the slot
572, continued movement of the slide 90 toward the rearward-most position
causes the extension bar 546 to rotate the axle 540 and the legs 542, 544 in a
second direction (opposite the first direction) so that the aft feet 558 of
the legs
542, 544 protrude through the corresponding apertures 560 in the base platform
522 (as shown in Figures 27 and 28). As the aft feet 558 extend further
through
the apertures 560, the aft portion 582 of the base platform 522 is lifted off
of the
ground 584 to further lift the furniture member 500 to the fully lifted
position
shown in Figure 27.
[00114] Providing the legs 542, 544 and moving the legs 542, 544 to the
positions shown in Figures 25 and 27 provides the furniture member 500 with an
increased range of motion relative to the chair 10 shown in Figures 1-21.
While
the seat heights of chair 10 and the furniture member 500 in the nominal
positions may be the same (e.g., 16.5 inches, as shown in Figures 13 and 22),
the extra range of motion provided by the mechanism 530 relative to the
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mechanism 30 results in a significant increase in legrest height and recline
angle
of the furniture member 500 in the fully reclined positions. A comparison of
Figures 21 and 25 shows that for exemplary embodiments of the chair 10 and
furniture member 500, providing the mechanism 530 with the rotatable legs 542,
544 increases the legrest height of the furniture member 500 by about 6.75
inches (e.g., from 20.25 inches to 27 inches) and increases the recline angle
of
the furniture member 500 by about nine degrees (e.g., from 12.25 degrees to
21.25 degrees).
[00115] The additional range of motion provided by rotating the legs
542, 544 to the "zero-gravity tilt" position shown in Figure 25 may be
particularly
comfortable for many users, as the user's feet (resting on the extended
legrest
516) will be positioned at or near the vertical level (i.e., the vertical
distance off of
the ground 584) of the user's heart. This "zero-gravity" positioning of the
user's
body in the furniture member 500 promotes restfulness and relaxation.
[00116] The extra range of motion provided by the mechanism 530
relative to the mechanism 30 also results in a significant increase in the
seat
height of the furniture member 500 relative to the chair 10 in the fully
lifted
positions. A comparison of Figures 16 and 27 shows that for exemplary
embodiments of the chair 10 and furniture member 500, providing the
mechanism 530 with the rotatable legs 542, 544 increases the seat height of
the
furniture member 500 by about 3.25 inches (e.g., from 21.75 inches to 24
inches).
[00117] The additional lift provided by rotating the legs 542, 544 to the
position shown in Figure 27 provides additional lift of a user seated in the
furniture member 500 toward a standing position, thereby reducing the amount
of effort and strength required of the user to stand up out of the furniture
member
500. This may be particularly beneficial for elderly or physically disabled
users.
[00118] The furniture member 500 may also include structure that
causes the seatback frame 514 to recline backward relative to the seat frame
182 and frame member 515 by approximately five degrees, for example, when
the furniture member 500 is in the lifted position to prevent unwanted
pressure
on the occupants head and/or shoulders during when the occupant is getting up
out of the furniture member 500 to a standing position. A comparison of
Figures
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22 and 27 illustrate this five-degree recline of the seatback frame 514
(Figure 22
shows an angle X between seatback frame 514 and frame member 515 in the
nominal position, and Figure 27 shows an angle of X+5 degrees in the lifted
position).
[00119] As shown in Figure 27, a pivot bracket 586 is connected to the
tube assembly 188, the seatback frame 514 and the seat frame 182 (via swing
assemblies 184). A pair of slide brackets 588 are attached to the seat frame
182. The slide brackets 588 include slots 590 that slidably receive the shaft
172.
As the furniture member 500 is moved into the lifted position, the weight of
the
seat frame 182 (and the rest of the seat bottom assembly supported by the seat
frame 182) causes the seat frame 182 and slide brackets 588 (and the rest of
the seat bottom assembly) to slide forward relative to the shaft 172, which
causes relative rotation between the seat frame 182 and the seatback frame
514, whereby the seatback frame 514 reclines backward approximately five
degrees. The pivot bracket 586 and the interface between the slide brackets
588 and the shaft 172 allow the balance of weight of the seatback, the seat
bottom and the mechanism 530 to determine the amount that the seatback
reclines in the lifted position. Therefore, in some embodiments, the seatback
may recline by an amount more or less than five degrees in the lifted
position.
[00120] While the mechanisms 530, 534 are described above as being
power mechanisms driven by motors 76, 164, in some configurations, either or
both of the mechanisms 530, 534 could be manual (i.e., not motor-driven)
mechanisms.
[00121] Example embodiments are provided so that this disclosure will
be thorough, and will fully convey the scope to those who are skilled in the
art.
Numerous specific details are set forth such as examples of specific
components, devices, and methods, to provide a thorough understanding of
embodiments of the present disclosure. It will be apparent to those skilled in
the
art that specific details need not be employed, that example embodiments may
be embodied in many different forms and that neither should be construed to
limit the scope of the disclosure. In some example embodiments, well-known
processes, well-known device structures, and well-known technologies are not
described in detail.
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[00122] The terminology used herein is for the purpose of describing
particular example embodiments only and is not intended to be limiting. As
used
herein, the singular forms "a," "an," and "the" may be intended to include the
plural forms as well, unless the context clearly indicates otherwise. The
terms
.. "comprises," "comprising," "including," and "having," are inclusive and
therefore
specify the presence of stated features, integers, steps, operations,
elements,
and/or components, but do not preclude the presence or addition of one or more
other features, integers, steps, operations, elements, components, and/or
groups
thereof. The method steps, processes, and operations described herein are not
to be construed as necessarily requiring their performance in the particular
order
discussed or illustrated, unless specifically identified as an order of
performance.
It is also to be understood that additional or alternative steps may be
employed.
[00123] When an element or layer is referred to as being "on," "engaged
to," "connected to," or "coupled to" another element or layer, it may be
directly
on, engaged, connected or coupled to the other element or layer, or
intervening
elements or layers may be present. In contrast, when an element is referred to
as being "directly on," "directly engaged to," "directly connected to," or
"directly
coupled to" another element or layer, there may be no intervening elements or
layers present. Other words used to describe the relationship between elements
should be interpreted in a like fashion (e.g., "between" versus "directly
between,"
"adjacent" versus "directly adjacent," etc.). As used herein, the term
"and/or"
includes any and all combinations of one or more of the associated listed
items.
[00124] Although the terms first, second, third, etc. may be used herein
to describe various elements, components, regions, layers and/or sections,
these elements, components, regions, layers and/or sections should not be
limited by these terms. These terms may be only used to distinguish one
element, component, region, layer or section from another region, layer or
section. Terms such as "first," "second," and other numerical terms when used
herein do not imply a sequence or order unless clearly indicated by the
context.
Thus, a first element, component, region, layer or section discussed below
could
be termed a second element, component, region, layer or section without
departing from the teachings of the example embodiments.
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[00125] Spatially relative terms, such as "inner," "outer," "beneath,"
"below," "lower," "above," "upper," and the like, may be used herein for ease
of
description to describe one element or feature's relationship to another
element(s) or feature(s) as illustrated in the figures. Spatially relative
terms may
be intended to encompass different orientations of the device in use or
operation
in addition to the orientation depicted in the figures. For example, if the
device in
the figures is turned over, elements described as "below" or "beneath" other
elements or features would then be oriented "above" the other elements or
features. Thus, the example term "below" can encompass both an orientation of
above and below. The device may be otherwise oriented (rotated 90 degrees or
at other orientations) and the spatially relative descriptors used herein
interpreted accordingly.
[00126] The foregoing description of the embodiments has been
provided for purposes of illustration and description. It is not intended to
be
exhaustive or to limit the disclosure. Individual elements or features of a
particular embodiment are generally not limited to that particular embodiment,
but, where applicable, are interchangeable and can be used in a selected
embodiment, even if not specifically shown or described. The same may also be
varied in many ways. Such variations are not to be regarded as a departure
from
the disclosure, and all such modifications are intended to be included within
the
scope of the disclosure.
29
