Note: Descriptions are shown in the official language in which they were submitted.
. CA 02857900 2014-07-30
DEFEATER LATCH HANDLE
FIELD OF THE INVENTION
100011 The invention relates to the field of locking latches, and more
particularly relates to
latching handles that include two separate locking features for use with
cabinets, doors, and the
like.
BACKGROUND OF THE INVENTION
100021 Latching mechanisms with handles that require two hands to
operate are sometimes
referred to in the field of latches as "defeater handles", or latches with a
"defeater" feature. In
defeater handles, the handle is rotatably connected to an escutcheon mounted
on a door. Turning
the handle moves a cam to lock or unlock the door. Many prior defeater latches
utilize two
separate locking features. One locking feature is a release mechanism having a
trigger on the
handle. The trigger is biased to a locked position when not being activated by
a user. In the
locked position, the trigger engages with the escutcheon and prevents the
handle from being
turned, and thus provides a first feature to prevent a door from being opened.
The second
locking feature is a release mechanism that includes a lock cylinder or a
turnable cylinder
situated in a head portion of the handle. The internal lock cylinder or
turnable cylinder is biased
to a locked position where the handle cannot be turned relative to the
escutcheon. Only when the
user manually turns and holds the lock cylinder or turnable cylinder in the
unlocked position will
the user be able to turn the handle to open the door. Thus, in defeater
handles with two locking
features, two hands are needed to operate the handle. Finally, some currently
available defeater
latches include a padlock clasp feature which is used to padlock the handle to
the escutcheon to
further prevent operation of the latch.
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[0003] Unfortunately, prior art defeater handles are unnecessarily
complex in design and
overly cumbersome to operate. There accordingly remains a need for new designs
of defeater
handles that offer an enhanced level of security while being easier to
operate, more robust and
simple in design to lower manufacturing costs, and less prone to malfunction
or failure through
years of use and weathering.
SUMMARY OF THE INVENTION
[0004] In one embodiment the invention is a defeater latch handle,
comprising; a handle with
a base portion with a top and a bottom, a recess formed in a bottom of the
base portion, the
recess including recess notch portion, and a cylinder hole formed through the
base portion; a lock
that is received in and accessible through the top of base portion through the
cylinder hole, the
lock being rotatable relative to the base portion between a locked state and
an unlocked state, the
lock having an engagement; a handle insert with a movable blocking device, the
movable
blocking device being engaged with the engagement of the lock to move the
movable blocking
device between a lock state and an unlocked state, the handle insert being
attached to the base
portion; a shaft extending from the handle insert; an escutcheon having a bore
formed therein to
rotatably receive the shaft, the bore having a bore notch formed therein which
bore notch is
adapted to receive the blocking device when the blocking device is in its
locked stated, the
escutcheon have a trigger slot formed therein; and a slidable trigger with an
extension catch, the
slidable trigger being is adapted to slide in the trigger slot between a
locked state, wherein the
extension catch is positioned in the recess notch, and an unlocked state,
wherein the extension
catch is moved out of the recess notch; wherein the handle can only be rotated
relative to the
escutcheon when both the lock and the slidable trigger are in their unlocked
states.
[0005] In another embodiment, the invention is a defeater latch handle,
comprising: a handle
with a base portion with a top and a bottom, a recess formed in a bottom of
the base portion, the
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recess including a generally semi-circular ring portion and a recess notch
portion that
communicates with and extends out of the semi-circular ring portion, and a
cylinder hole formed
through the base portion; a lock that is received in and accessible through
the top of base portion
through the cylinder hole, the lock being rotatable relative to the base
portion between a locked
state and an unlocked state, the lock having an engagement; a biasing device
to rotate the lock to
its locked state; a handle insert with a movable blocking device, the movable
blocking device
being engaged with the engagement on the lower end of the lock to move the
movable blocking
device between a lock state and an unlocked state, the handle insert being
attached to the base
portion; a shaft extending from the handle insert; an escutcheon having a bore
formed therein to
rotatably receive the shaft, the bore having a bore notch formed therein which
notch is adapted to
receive the blocking device when the blocking device is in its locked stated,
the escutcheon have
a trigger slot formed therein; a slidable trigger with an extension catch, the
slidable trigger being
is adapted to slide in the trigger slot between a locked state, wherein the
extension catch is
positioned in the recess notch, and an unlocked state, wherein the extension
catch is moved out
of the recess notch and into the semi-circular ring portion; a biasing device
to bias the trigger
latch to is locked state; and a lock cam that is attached to the shaft;
wherein the handle can only
be rotated relative to the escutcheon when both the lock and the slidable
trigger are in their
unlocked states.
100061 In yet another embodiment the invention provides a defeater latch
handle,
comprising: a handle with a base portion with a top and a bottom, a recess
formed in a bottom of
the base portion, the recess including recess notch portion, and a cylinder
hole formed through
the base portion; a lock that is received in and accessible through the top of
base portion through
the cylinder hole, the lock being rotatable relative to the base portion
between a locked state and
an unlocked state, the lock having an engagement; a movable blocking device,
the movable
blocking device being engaged with the engagement of the lock to move the
movable blocking
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device between a lock state and an unlocked state; a shaft extending below the
bottom of base
portion of the handle; an escutcheon having a bore formed therein through
which rotatably
passes the shaft, the bore having a bore notch formed therein which bore notch
is adapted to
receive the blocking device when the blocking device is in its locked stated,
the escutcheon have
a trigger slot formed therein; and a slidable trigger with an extension catch,
the slidable trigger
being is adapted to slide in the trigger slot between a locked state, wherein
the extension catch is
positioned in the recess notch, and an unlocked state, wherein the extension
catch is moved out
of the recess notch; wherein the handle can only be rotated relative to the
escutcheon when both
the lock and the slidable trigger are in their unlocked states.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG. 1A is a front right isometric view of an exemplary
embodiment the defeater
latch handle with internal key lock cylinder of the invention with a padlock
locked in place.
[0008] FIG. 1B is a fully exploded side view of an exemplary embodiment
the defeater latch
handle with internal key lock cylinder of the invention.
[0009] FIG. 1C is a partially exploded side view of an exemplary embodiment
the defeater
latch handle with internal key lock cylinder of the invention.
[0010] FIG. 1D is a partially exploded side view of an exemplary
embodiment the defeater
latch handle with turnable cylinder of the invention.
[0011] FIG. 1 E is isometric bottom view showing the handle portion
separated from the
escutcheon portion of the exemplary embodiment the defeater latch handle with
internal key lock
cylinder and defeater latch handle with turnable cylinder of the invention.
[0012] FIG. 1F is a rear isometric view of the assemble handle and shaft
portion.
[0013] FIG. 2A is a lower front right isometric view of an exemplary
embodiment the
defeater latch handle of FIG. lA without a padlock and in a locked state.
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[0014] FIG. 2B is a cross-sectional view of the defeater latch handle
through view lines 2B-
211 of FIG. 2A, with the trigger undepressed and the key cylinder locked.
[0015] FIG. 2C is a cross-sectional view of the defeater latch handle
through view lines 2C-
2C of FIG. 2A, with the trigger depressed and the key cylinder locked.
[0016] FIG. 2D is a cross-sectional view of the defeater latch handle
through view lines 2D-
2D of FIG. 2A, with the trigger depressed and the key cylinder unlocked.
[0017] FIG. 3A is a front plan view of the defeater latch handle with
internal key lock
cylinder of FIG. 1A.
[0018] FIG. 3B is a cross-sectional view through view lines 3B-3B of
FIG. 3A showing the
defeater latch handle with internal key lock cylinder of the invention.
[0019] FIG. 3C is a cross-sectional view through view lines 3C-3C of
FIG. 3A showing the
defeater latch handle with internal key lock cylinder of the invention.
[0020] FIG 3D is a cross-sectional view through view lines 3D-3D of FIG.
3A showing the
defeater latch handle with a turnable cylinder of the invention.
[0021] FIG 3E is a cross-sectional view through view lines 3E-3E of FIG. 3A
showing the
defeater latch handle with a turnable cylinder of the invention.
[0022] FIG. 4 is a rear plan view of the defeater latch handle with
internal key lock cylinder
of FIG. 1A.
[0023] FIG. 5 is a top view of the defeater latch handle with internal
key lock cylinder of
FIG. 1A.
[0024] FIG. 6 is a bottom view of the defeater latch handle with
internal key lock cylinder of
FIG. 1A.
[0025] FIG. 7 is a rear right isometric view showing of the defeater
latch handle of FIG. IA
with its turn direction keyed washer in a first orientation on the shaft.
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[0026] FIG. 8 is a rear right isometric view showing of the defeater
latch handle of FIG. IA
with its turn direction keyed washer in a second orientation on the shaft.
[0027] FIG. 9A is a front left isometric view showing the defeater latch
handle of FIG. 1A
unlocked and turned 1/4 turn in a counterclockwise direction, as is permitted
when the turn
direction keyed washer is in the first orientation of FIG. 7.
[0028] FIG. 9B is a side cross-sectional view through view lines 9B-9B
of FIG. 9A.
[0029] FIG. 10A is a front left isometric view showing the defeater
latch handle of FIG. 1A
unlocked and turn 1/4 turn in a clockwise direction, as is permitted when the
turn direction keyed
washer is in the second orientation of FIG. 8.
[0030] FIG. 10B is a side cross-sectional view through view lines 10B-10B
of FIG. 10A.
DETAILED DESCRIPTION
[0031] Turning first to FIG. 1A, there is shown a front right isometric
view of an exemplary
embodiment the defeater latch handle with internal key lock cylinder 100. A
defeater latch
handle 10 receives an internal key lock cylinder 12. A padlock 14 (shown in
phantom) can be
used to further secure locking of the defeater latch handle with internal key
lock cylinder 100.
The padlock is shown with its U-shaped bolt 16. The handle 10 includes a base
20 and a grip
portion 22. The base 20 has a trigger catch portion 18, the purpose of which
is described below.
The U-shaped bolt 16 passes through a trigger hole 24 formed in a trigger 26.
The handle 10
further has a head 28 on the base 20. The head 28 is adapted to provide access
to the internal key
lock cylinder 12 so that users can operate the internal key lock cylinder 12
with a key (not
shown.) The base 20 of the handle 10 interfaces with an escutcheon 32. The
escutcheon 32 of
the defeater latch handle with internal key lock cylinder 100 is mounted on
the outside of a door
D that is adjacent to a door frame F.
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[0032] FIG. 1B is a fully exploded side view of an exemplary embodiment
the defeater latch
handle with an internal key lock cylinder 100 of the invention. FIG. 1C is a
partially exploded
side view of an exemplary embodiment the defeater latch handle with internal
key lock cylinder
100 of the invention, with the parts in the escutcheon 32 and below shown
brought together.
FIG. 1D is a partially exploded side view of an exemplary embodiment the
defeater latch handle
with a turnable cylinder 40 of the invention. FIG. 1D shows its defeater latch
handle 300 in a
similar state of assembly as the defeater latch handle 100 of FIG. 1C, but
includes a turnable
cylinder 40 instead of an internal lock cylinder 12. Except for there being a
turnable cylinder 40
compared to the internal key lock cylinder 12 in the defeater latch handle 100
of FIG. 1C, the
defeater latch handles 100 and 300 are the identical, and the description
herein applies to both.
FIG. 1 E is isometric bottom view showing the handle portion 10 separated from
the escutcheon
portion 32 of the exemplary embodiment the defeater latch handle with an
internal key lock
cylinder 100 and defeater latch handle 300 of the invention.
[0033] Turning to FIG. 1B, the head 28 of the handle 10 has a cylinder
hole 30 formed
therein which is adapted to receive the internal key lock cylinder 12 or the
turnable cylinder 40.
FIG. 1C is a partially exploded side view of an exemplary embodiment the
defeater latch handle
with internal key lock cylinder 100 of the invention, with the parts in the
escutcheon 32 and parts
of the handle insert 102 and shaft 104 brought together. The shaft 104 can be
provided in
different lengths as may be required to meet the needs of any particular
application. The internal
key lock cylinder 12 has a lock head 50 at its top with key slot 52 for
passage of the key (not
shown), a cylindrical body 54, a turning base 56, and a non-round cam end 58.
Spring loaded
clips 60 extend around the cylindrical body 54. A plug insert 62 with a
through hole 64 is
provided to receive the internal key lock cylinder 12 in the through hole 64.
As shown in FIG.
2B, the through hole 64 has reliefs 66 formed on inside walls 68 of the
through hole 64, which
reliefs 66 are designed to engage the spring loaded clips 60 when the internal
key lock cylinder
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12 is inserted into the through hole 64 of the plug insert 62. The plug insert
62 has protrusions
70 formed around it outer perimeter 72. A spring 74 is provided to bias the
internal key lock
cylinder 12 and connected parts to its lock state. The defeater latch handle
with an internal key
lock cylinder 100 and the defeater latch handle with turnable key lock
cylinder 300 both include
a handle insert 102, and a shaft 104 which is preferably detachably attached
to the handle insert,
e.g., by a pin 106 which passes through a pin hole 108 in a top part 110 of
the shaft 104 and an
aligned hole 112 formed in a bottom end 114 of the handle insert 102. The
shaft 104 has a
threaded lower end 116 and is preferably non-round (e.g., such as having flat
sides 118). The
handle insert 102 has an upper end 120 with screw holes 122 through which
screws 124 will pass
and screw into the base 20 of the handle 10 to retain the handle insert 102
and its carried shaft
104 to the handle 10. Thus, when the handle 10 is turned, the handle insert
102 and shaft 104
will likewise turn. Below the top part 110 of the shaft a groove 126 can be
provided to receive a
seal, such as an 0-ring 128. A gasket 130 is provided. The escutcheon 32 has a
bore 132 with a
notch 134 formed through its top surface 136. The bore 132 passes through a
threaded extension
138 that extends below a bottom surface 140 of the escutcheon 32. As best
shown in FIGS. 9A,
9B, 10A, and 10B, the bore 132 has an upper portion 132A that is generally
cylindrical and sized
to receive the cylindrical bottom end 114 of the handle insert 102, and a
lower portion 132B that
is generally cylindrical and sized to receive the top part 110 of the shaft
104. At the upper end of
the upper portion 132A the notch 134 extends outside of the generally
cylindrical confines of the
bore 132. A threaded extension nut 142 is provided to screw onto the threaded
extension 138. A
turn direction keyed washer 144 has a non-round hole 146 that is complementary
to the threaded
lower end 116 with flat sides 118 of the shaft 104. The turn direction keyed
washer 144 has two
ears 148A and 148B at opposite ends thereof. As best shown in FIGS. 7 and 8,
the turn direction
keyed washer 144 will slide onto the threaded lower end 116 of the shaft 104
in two possible
orientations, and will function to control whether the defeater latch handle
will operate by being
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turned clockwise, or counterclockwise, as will be discussed further below. A
cam engaging
washer 150 with a non-round hole 152 is also provided that slides onto the
threaded lower end
116 with flat sides 118 of the shaft 104. The cam engaging washer 150 has a
notch 154 at one
side. A lock cam 160 is provided and has a non-round hole 162 that slides onto
the threaded
lower end 116 of the shaft 104. The lock cam 160 has an extension arm 164 that
is adapted
engage with a catch on door frame (not shown). A protrusion 166 can be formed
on a lever
portion 168. When the lock cam 160 is positioned on the threaded lower end 116
of the shaft
104, the protrusion 166 will engage with the notch 154 of the cam engaging
washer 150 and
further help retain it in position. Finally, the cam 160 is retained in place
with a cam nut 170.
The lock cam 160 can be placed on the threaded lower end 116 of the shaft 104
in a desired
orientation. By selected a lock cam 160 with the desired dimensions, the
defeater latch handle
100 or 300 can be customized to fit a wide variety of requirements, such as
have an extra deep
setback or throw. Associated with the handle insert 102 is a block bar 174.
The block bar 174
has a cutout 176 formed on an upper surface, and has a protruding end 178.
Referring back to
the escutcheon 32, it has a wedge extension 180 that extends from the sidewall
182 thereof. A
horizontal upside down T-shaped slot 184 partially extends into the wedge
extension 180
towards the bore 132 formed therein, but does not intersect the bore 132. The
upside down T-
shaped slot 184 has a narrower upper portion 186 defined by upper slot
sidewalls 188 and a
wider lower portion 190 with a floor 192. The horizontal upside down T-shaped
slot 184 is
adapted to receive a slidable trigger 200. The slidable trigger 200 has a
bottom surface 202 with
extensions 204 that are slidably captured in the wider lower portion 190 with
floor 192 of the
upside down T-shaped slot 184. The slidable trigger 200 has a spring catch 206
on its back wall
208, has an extension catch 210 that rises up near the back wall 208, has a
trigger grip 212 at its
front end 214, and has a lock hasp hole 216 formed through its sidewalls 218.
When assembled,
a spring 220 fits onto the spring catch 206 on its back wall 208 of the
slidable trigger 200 and is
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received in the horizontal upside down T-shaped slot 184. This will bias the
slidable trigger 200
outwardly from the slot 184. The extension catch 210 extends upwardly above
the top surface
136 of the escutcheon 32. Lastly, a gasket 222 can be provided to provide for
improved sealing
between the escutcheon 32 and a door to which it will be affixed. As best
shown in FIGS. 4, 3B,
3C, 4, 7, and 8, the gasket 222 (such as having a round cross-section) fits
into a groove 224
formed in the bottom surface 140 of the escutcheon 32. As noted above, FIG. 1C
is a partially
exploded side view of the exemplary embodiment the defeater latch handle with
an internal key
lock cylinder 100 of the invention, with the parts in the escutcheon 32 and
below shown brought
together, and with the handle insert 102 and shaft 104 attached. In this view,
the slidable trigger
200 is received in the horizontal upside down T-shaped slot 184, and the
extensions 204 ride in
the wider lower portion 190. The extension catch 210 extends above the level
of the top surface
136 of the escutcheon 32, and as will be described further below with respect
to FIG. 1F, is
adapted to be received in a recess 230 formed in the underside of the trigger
catch portion 18 and
base 20 of the handle 10, which recess 230 has a notch portion 232 that
extends into the trigger
catch portion 18 and a semi-circular ring portion 234 of the recess 230 formed
in the underside
of the base 20. The notch portion 232 of the trigger catch portion 18 has an
outer edge 240.
100341 Also formed in the underside of the base 20 is a handle insert
cavity 236 sized and
shaped to receive the upper end 120 of the handle insert 102. Screw holes 238
are positioned to
receive the screws 124. In the locked position of the handle 10 relative to
the escutcheon, the
slidable trigger 200 is pushed out by the spring 220 so that its extension
catch 210 will be
received in the notch portion 232 of the recess 230. This prevents the handle
10 from being
turned. When the slidable trigger 200 is pushed inwardly all the way in
opposition to the spring
220, its extension catch 210 will be positioned in the semi-circular ring
portion 234. Assuming
the cylinder lock 12 or turnable cylinder 40 are also rotated by a user to
their unlocked position,
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the handle 10 can then be rotated, thereby bringing the extension catch 210
into a position of the
semi-circular ring portion 234 not in line with the notch portion 232.
100351 FIG. 11) is a partially exploded side view of an exemplary
embodiment the defeater
latch handle with a turnable cylinder 300 of the invention. FIG. 1D shows its
defeater latch
handle 300 in a similar state of assembly as the defeater latch handle 100 of
FIG. 1C, but
includes a turnable cylinder 40 instead of an internal lock cylinder 12. This
embodiment is
identical to the embodiment of the defeater latch handle with internal key
lock cylinder with
internal key lock cylinder 100 of FIG. 1 A except that instead of
incorporating an internal key
lock cylinder 12 that is operated with a key, it uses a turnable cylinder 40.
FIG. 1D shows the
turnable cylinder 40 as having a rectangular head 42 for turning, but which
turnable cylinder 40
can be operated by turning it with any desired type of tool, such as a driver
(flat, crosshead,
Allen, star drive), or the turnable cylinder 40 can include a head that is
graspable by a user's
fingers (not shown.) Opposite the rectangular head 42 is a non-round cam end
44. The same
references used with reference to the defeater latch handle with internal key
lock cylinder 100 of
FIG. 1B and 1C are used. The handle 10 has a grip portion 22, and a head 28 on
the base 20.
The head 28 with a cylinder hole 30 that is adapted to provide access to the
turnable cylinder 40,
viz., so users can operate the turnable cylinder 40 with a screwdriver (not
shown.) The base 20
of the handle 10 interfaces with an escutcheon 32. The escutcheon 32 of the
defeater latch
handle with turnable cylinder 300 is mounted on the outside of a door adjacent
to a door frame
36, neither shown. A spring clip 46 fits around the turnable cylinder 40 and
rotatably retains it in
groove 48 formed inside a plug insert 62.
100361 FIG. lE is isometric bottom view showing the handle portion 10
separated from the
escutcheon portion 32 of the exemplary embodiment the defeater latch handle
with an internal
key lock cylinder 100 and defeater latch handle with a turnable cylinder 300
of the invention. In
this view, the handle insert 102 is engaged with the shaft 104 and both are
attached with the base
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20 of the handle 10, and slidable trigger 200 is engaged with the escutcheon
32. The top surface
136 and bottom surface 140 are shown, with the threaded extension 138 extended
from the
bottom surface 140. The extension catch 210 of the slidable trigger 200 is
shown extending
above the top surface 136 of the escutcheon 32.
100371 FIG. 1F is a rear isometric view of the assemble handle and shaft
portion of the
defeater latch handle with an internal key lock cylinder 100 and defeater
latch handle with a
turnable cylinder 300 of the invention. The handle 10, trigger catch portion
18, base 20, grip
portion 22, and cylinder hole 30 are shown with the handle insert 102 and its
attached shaft 104
attached to the base 20 with screws 124. The recess 230 formed in the
underside of the trigger
catch portion 18 and base 20 of the handle 10, which recess 230 has a notch
portion 232 that
extends into the trigger catch portion 18 and a semi-circular ring portion 234
of the recess 230
formed in the underside of the base 20. Also formed in the underside of the
base 20 is a handle
insert cavity 236 side to receive the upper end 120 of the handle insert 102.
Screw holes 238 are
positioned to receive the screws 124. The semi-circular ring portion 234 has
terminal ends 242A
and 242. As explained with reference to FIGS. 98 and 10B, these terminal ends
242A and 242B,
in connection with the extension catch 210 of the slidable trigger 200,
prevent over-rotation of
the handle 10 relative to the escutcheon 32.
100381 FIG. 2A is a lower front right isometric view of the defeater
latch handle with internal
key lock cylinder 100 of FIG. 1A, without a padlocked and in a locked state,
with the trigger 200
undepressed and the key cylinder 12 locked. The trigger catch portion 18, base
20, and grip
portion 22 of the handle 10 are aligned with the escutcheon 32, such that the
trigger 200 extends
out of the wedge extension 180 of the escutcheon 32 and engages with the
trigger catch portion
18.
[0039] FIG. 2B is a cross-sectional view of the defeater latch handle
100 through view lines
2B-2B of FIG. 2A, with the trigger 200 is undepressed and the key cylinder 12
locked. FIG. 2C
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is a cross-sectional view of the defeater latch handle 100 through view lines
2C-2C of FIG. 2A,
with the trigger 200 depressed and the key cylinder 12 still locked. Finally,
FIG. 2D is a cross-
sectional view of the defeater latch handle 100 through view lines 2D-2D of
FIG. 2A, with the
trigger 200 depressed and the key cylinder 12 unlocked. The internal key lock
cylinder 12 is
shown with its a turning base 56 and non-round cam end 58 extending through
the plug insert 62,
which plug insert it fitted into the cylinder hole 30 in the head 20 of the
handle 10. As best
shown in FIG. 3B, the through hole 64 has reliefs 66 formed on inside walls 68
of the through
hole 64, which reliefs 66 are designed to engage the spring loaded clips 60
when the internal key
lock cylinder 12 is inserted into the through hole 64 of the plug insert 62.
Turning back to FIGS.
2B-2D, the spring 74 is provided to bias the internal key lock cylinder 12 to
its locked state. The
upper end 120 of the handle insert 102 attached with screws 124 to the base 20
of the handle 10
to retain the handle insert 102 and its carried shaft 104 to the handle. Thus,
when the handle is
turned, the handle insert 102 and shaft 104 will likewise turn. The 0-ring 128
fits in the groove
126 to establish a seal to prevent water from passing into to the handle latch
through the bore 132
in the escutcheon 32. As best shown in FIGS. 3B-3E, the bore 132 has an upper
portion 132A
that is generally cylindrical and sized to receive the cylindrical bottom end
114 of the handle
insert 102, and a lower portion 132B that is generally cylindrical and sized
to receive the top part
110 of the shaft 104. The handle insert 102 has in its upper end 120 a channel
172 formed
therein that is designed to slidably receive the block bar 174. As can be seem
the non-round cam
end 58 of the lock cylinder 12 fits into cutout 176 formed in the block bar
174. When the lock
cylinder 12 is unlocked, the non-round cam end 58 spins around from position
shown in FIG.
2A, where the blocking bar 174 is moved to the far right end of the channel
172, to the position
shown in FIG. 2c, where the blocking bar 174 is moved to the far left end of
the channel 172, in
which case the protruding end 178 of the blocking bar 174 will not interfere
with rotation of the
handle 10. Turning back to FIG. 2B, in this position, the slidable trigger 200
is undepressed and
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the key cylinder 12 locked, and the trigger 200 and its extension catch 210
are biased by the
spring 220 which fits on the spring catch 206 into contact with the outer edge
240 of the notch
portion 232 of the trigger catch portion 18. In this state, the trigger 200
independently prevents
rotation of the handle 10 regardless of the state of the key lock 12. In FIG.
2C, the trigger 200 is
shown pushed inwardly away from the outer edge 240 of the notch portion 232 of
the trigger
catch portion 18. In this state, the extension catch 210 will not otherwise
block rotation of the
handle but for the key lock 12 still being in its locked position, wherein the
blocking bar 174 is in
its locked position. Lastly, in FIG. 2D, the defeater latch handle with
internal key lock cylinder
100 is shown with both its key lock 12 and trigger 200 moved to their unlocked
position, which
will allow a user to turn the handle 10
[0040] Turning to FIGS. 3A and 4, there are shown a front plan view and
rear plan view,
respectively, of the defeater latch handle with internal key lock cylinder
100. The handle 10,
trigger catch portion 18, handle base 20 and grip portion 22, and escutcheon
32 with wedge
extension 180, the gasket 222 in the groove 224 are shown.
[0041] FIG. 3B is a cross-sectional view through view lines 3B-3B of FIG.
3A showing the
defeater latch handle with internal key lock cylinder 100, and FIG. 3C is a
cross-sectional view
through view lines 3D-3C of FIG. 3A showing the defeater latch handle with
internal key lock
cylinder 100. The internal key lock cylinder 12 is shown with its a turning
base 56 and non-
round cam end 58 extending through the plug insert 62, which plug insert 62 it
fitted into the
cylinder hole 30 in the head 20 of the handle 10. The through hole 64 has
reliefs 66 formed on
inside walls 68 of the through hole 64, which reliefs 66 are designed to
engage the spring loaded
clips 60 when the internal key lock cylinder 12 is inserted into the through
hole 64 of the plug
insert 62. The spring 74 is provided to bias the internal key lock cylinder 12
to its locked state.
The upper end 120 of the handle insert attached with screws 124 within the
handle insert cavity
236 in the base 20 of the handle 10 to retain the handle insert 102 and its
carried shaft 104 to the
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= CA 02857900 2014-07-30
handle 10. Thus, when the handle 10 is turned, the handle insert 102 and shaft
104 will likewise
turn. The 0-ring 128 fits in the groove 126 to establish a seal to prevent
water from passing into
to the handle latch through the bore 132 in the escutcheon 32. The bore 132
has an upper portion
132A that is generally cylindrical and sized to receive the cylindrical bottom
end 114 of the
handle insert 102, and a lower portion 132B that is generally cylindrical and
sized to receive the
top part 110 of the shaft 104. The handle insert 102 has in its upper end 120
a channel 172
formed therein that is designed to slidably receive the block bar 174. As can
be seem the non-
round cam end 58 of the lock cylinder 12 fits into cutout 176 formed in the
block bar 174. The
notch portion 232 of the recess in the base 20 of the handle 10 is shown in
FIG. 3C and portions
of the semi-circular ring portion 234 are shown in FIG. 3B.
[0042] FIG 3D is a cross-sectional view through view lines 3D-3Dof FIG.
3A showing the
defeater latch handle with a turnable cylinder 300, and FIG 3E is a cross-
sectional view through
view lines 3E-3E of FIG. 3A showing the defeater latch handle with a turnable
cylinder 300.
These views are identical to those of FIGS. 3B and 3C, except that the
turnable cylinder 40 with
rectangular head and the spring clip 46 fits around the turnable cylinder 40
and rotatably retains
it in the groove 48 formed inside its plug insert 62. The non-round cam end 44
of the turnable
cylinder 40 engages with the blocking bar 174 and functions the same as the
defeater latch
handle with an internal key lock cylinder 100. Other features are as
previously described with
respect to FIGS. 3B and 3C and are not repeated.
[0043] FIG. 5 is a top view and FIG. 6 is a bottom view of the defeater
latch handle with
internal key lock cylinder 100. The threaded extension 138 is shown extended
from the bottom
surface 140 of the escutcheon 32 with the shaft 104 protruding therethrough.
The base 20 of the
handle 10 sits on the escutcheon 32 and the trigger grip 212 is shown along
with the wider lower
portion 190 of the horizontal upside down T-shaped slot.
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[0044] FIG. 7 is a rear right isometric view showing of the defeater
latch handle 100/300
with its turn direction keyed washer 144 in a first orientation on the
threaded lower end 116 of
the shaft, and FIG. 8 is a rear right isometric view showing of the defeater
latch handle 100/300
with its turn direction keyed washer 144 in a second orientation on the
threaded lower end 116 of
the shaft. The threaded extension 138 has at its terminal end two upwardly
extending stops 250
and 252 that are opposite each other. Stop 250 has sides 250A and 250B and
stop 252 has sides
252A and 252B. Between the two stops 250 and 252 are spaces 254 and 256. In
FIG. 7, the turn
direction keyed washer 144 is positioned on the threaded lower end 116 of the
shaft such that its
ear 148A abuts side 250B of stop 250 and its ear 148B abuts side 252B of stop
252. When the
key lock 12 or the turnable cylinder 40 are unlocked, and the trigger 200 is
depressed, the handle
10 can be rotated only clockwise by about one quarter turn. In contrast, in
FIG. 8, the turn
direction keyed washer 144 is positioned on the threaded lower end 116 of the
shaft 104 such
that its ear 148A abuts side 250A of stop 250 and its ear 148B abuts side 252A
of stop 252.
When the key lock 12 or the turnable cylinder 40 are unlocked, and the trigger
200 is depressed,
the handle 10 can be rotated only counterclockwise by about one quarter turn.
Thus, with the
same defeater latch handle 100/300, by simply changing the orientation of the
turn direction
keyed washer 144 on the threaded lower end 116 of the shaft, the defeater
latch handle 100/300
can be changed from a clockwise turn to open latch to a counterclockwise turn
to open latch.
[0045] FIG. 9A is a front left isometric view showing the defeater latch
handle 100 unlocked
and with its handle 10 turned 1/4 turn in a counterclockwise direction
relative to the escutcheon 32
, as is permitted when the turn direction keyed washer 144 is in the first
orientation of FIG. 7.
This also rotates the shaft 104 and its attached lock cam 160.
[0046] FIG. 9B is a side cross-sectional view through view lines 9B-9B
on FIG. 9A, and
shows the handle 10 and escutcheon 32 and related parts revealed. As can be
seen, when the
handle 10 is turned relative to the escutcheon 32, the extension catch 210 of
the slidable trigger
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200 will be in the semi-circular ring portion 234, and out of the notch
portion 232 of the recess
formed in the base 20 of the handle 10. As shown in FIG. 1F, in addition to
the turn direction
keyed washer 144 acting to prevent rotation of the handle 10 relative to the
escutcheon more than
about a quarter turn in either a clockwise or counterclockwise orientation,
the fact that the semi-
circular ring portion 234 extends through an arc of about 180 degrees likewise
prevents over
rotation of the handle 10 relative to the escutcheon 32 as the extension catch
210 of the slidable
trigger 200 will be stopped by contact with the terminal ends 242A and 242 of
the semi-circular
ring portion 234. When the handle 10 is turned from its locked position, such
as shown in FIG.
1A, the extension catch 210 of the slidable trigger 200 will no longer be in
the cavity of the notch
portion 232 of the recess, but will be in the narrower semi-circular ring
portion 234.
[0047] FIG. 10A is a front left isometric view showing the defeater
latch handle 100
unlocked and with its handle 10 turned 1/4 turn in a clockwise direction
relative to the escutcheon
32 , as is permitted when the turn direction keyed washer is in the first
orientation of FIG. 8.
This also rotates the shaft 104 and its attached lock cam 160.
[0048] FIG. 10B is a side cross-sectional view through view lines 10B-10B
on FIG. 10A,
and shows the handle 10 and escutcheon and related parts revealed. As can be
seen, when the
handle 10 is turned relative to the escutcheon, the extension catch 210 of the
slidable trigger 200
will be in the semi-circular ring portion 234 of the recess formed in the base
20 of the handle 10.
As shown in FIG. 1F, in addition to the turn direction keyed washer 144 acting
to prevent
rotation of the handle 10 relative to the escutcheon more than about a quarter
turn in either a
clockwise or counterclockwise orientation, the fact that the semi-circular
ring portion 234
extends through an arc of about 180 degrees likewise prevents over rotation of
the handle 10
relative to the escutcheon 32 as the extension catch 210 of the slidable
trigger 200 will be
stopped by contact with the terminal ends 242A and 242 of the semi-circular
ring portion 234.
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CA 02857900 2014-07-30
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[0049] As described above, the embodiments of the defeater latch handle
100/300
accomplished the goals of providing an enhanced level of security while being
easier to operate,
more robust and simple in design to lower manufacturing costs, and less prone
to malfunction or
failure through years of use and weathering. The preferred embodiments of this
invention have
been disclosed, however, so that one of ordinary skill in the art would
recognize that certain
modifications would come within the scope of this invention. It is, therefore,
to be understood
that within the scope of the appended claims, the invention may be practiced
otherwise than as
specifically described.
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