Information
-
Patent Grant
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6302457
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Patent Number
6,302,457
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Date Filed
Monday, May 22, 200024 years ago
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Date Issued
Tuesday, October 16, 200122 years ago
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Inventors
-
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Examiners
Agents
- Kamrath; Alan
- Rider, Bennett, Egan & Arundel, LLP
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CPC
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US Classifications
Field of Search
US
- 292 16923
- 292 173
- 292 347
- 292 3363
- 292 357
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International Classifications
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Abstract
A door lock includes a main body including a transmission assembly and a positioning assembly. The positioning assembly includes an inside seat and an outside seat. An inside rose liner is mounted around the inside seat and includes two positioning holes. An inside rose is mounted around the inside rose liner. An anti-torque ring is mounted around the outside seat and includes two lugs formed thereon. Two positioning posts respectively project from the lugs and extend along a longitudinal direction of the anti-torque ring. An outside rose liner includes an inner threading that is engaged with an outer threading of the outside seat. The outside rose liner includes a side with an annular recessed portion for receiving the anti-torque ring. The annular recessed portion includes two recess extensions for positioning the lugs of the anti-torque ring. An outside rose is securely mounted around the outside rose liner to rotate move therewith. Rotation of the outside rose causes longitudinal movement of the outside rose and the outside rose liner relative to the outside seat to suit different door thickness.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a door lock that can be installed easily. The present invention also relates to a door lock for preventing loosening of the rose assembly from the lock chassis when a torque is applied the outside rose assembly.
2. Description of the Related Art
U.S. Pat. No. 4,921,289 to Shen issued on May 1, 1990 discloses a cylindrical lever type lock structure for handicapped people. It is found that the lock structure is not strong enough to resist intentional destruction by means of forcibly pulling the outside handle away from the door. U.S. Pat. No. 5,265,924 to Kim issued on Nov. 30, 1993 discloses a lever assembly for a door lock. Nevertheless, the rose assembly must be removed for adjustment in response to different thickness of the door to which the door lock is mounted. After the door lock is mounted to a door, the outside rose assembly should not be loosened when a torque is applied to the outside rose. Yet, the outside rose assembly still tends to be loosened as a result of door slam or applying a larger torque to the outside rose.
The present invention is intended to provide an improved door lock that mitigates and/or obviate the above problems.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a door lock that can be installed easily.
It is another object of the present invention to provide a door lock for preventing damage as a result of applying torque to the outside rose assembly.
It is a further object of the present invention to provide a door lock for preventing loosening of the outside rose assembly in case of door slam or applying a larger torque to the outside rose.
A door lock in accordance with the present invention comprises:
a main body including a transmission assembly and a positioning assembly, the transmission assembly including an inside spindle, an outside spindle, a retractor, and a latch bolt, the positioning assembly including an inside seat and an outside seat, the outside seat including an outer threading;
an inside rose liner mounted around the inside seat;
an inside rose mounted around the inside rose liner;
an anti-torque ring mounted around the outside seat and including two lugs formed thereon, two positioning posts respectively projecting from the lugs and extending along a longitudinal direction of the anti-torque ring;
an outside rose liner including an inner threading that is engaged with the outer threading of the outside seat, the outside rose liner including a side with an annular recessed portion for receiving the anti-torque ring, the annular recessed portion including two recess extensions for positioning the lugs of the anti-torque ring, thereby preventing loosening of the outside rose liner;
an outside rose securely mounted around the outside rose liner to rotate move therewith;
an inside handle operably connected to the transmission assembly; and
an outside handle operably connected to the transmission assembly;
whereby rotation of the outside rose causes longitudinal movement of the outside rose and the outside rose liner relative to the outside seat to suit a thickness of a door to which the door lock is mounted.
The inside seat includes an outer threading having two diametrically disposed flat surfaces. The inside rose liner includes a hole. An inner periphery that defines the hole of the inside rose liner includes two diametrically disposed flat sections. The inside rose liner is mounted around the inside seat with the flat sections of the inside rose liner engaged with the flat surfaces of the inside seat.
A pull-resisting ring is mounted around the inside seat. The pull-resisting ring includes an inner threading engaged with the outer threading of the inside seat. The inside rose liner includes two diametrically disposed protrusions, and wherein the pull-resisting ring includes a plurality of annularly spaced depressions for releasably receiving the protrusions, thereby retaining the pull-resisting ring.
The outside seat includes an outer threading having two diametrically disposed flat surfaces. The anti-torque ring including a hole. An inner periphery that defines the hole of the anti-torque ring includes two diametrically disposed flat sections. The anti-torque ring is mounted around the outside seat with the flat sections of the anti-torque ring engaged with the flat surfaces of the outside seat.
The inside rose liner includes two positioning holes. Each positioning post includes a screw hole aligned with an associated positioning hole. Two screws are provided and each is extended through the associated positioning hole and the screw hole in an associated positioning post.
Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
an exploded perspective view of a door lock in accordance with the present invention.
FIG. 2
is an exploded perspective view of the door lock in accordance with the present invention, wherein most of the parts of the door lock have been assembled.
FIG. 3
is a sectional view of the door lock in accordance with the present invention mounted to a thin door.
FIG. 4
is a sectional view similar to
FIG. 3
, wherein the door lock is mounted to a thick door.
FIG. 5
is an exploded perspective view of a modified embodiment of the door lock in accordance with the present invention, wherein most of the parts of the door lock have been assembled.
FIG. 6
is a view of the door lock in
FIG. 2
mounted to a door.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to
FIGS. 1 and 2
, a door lock in accordance with the present invention generally includes a main body
10
, an inside rose liner
42
, an outside rose liner
50
, an anti-torque ring
44
, an inside rose
41
, a pull-resisting ring
46
, an outside rose
54
, an inner handle
40
(e.g., a lever handle), and an outside handle
55
(e.g., a lever handle). The main body
10
includes a transmission assembly
20
and a positioning assembly
30
. The transmission assembly
20
includes an inside spindle
23
, an outside spindle
23
, a retractor
21
, and a latch bolt
22
. The positioning assembly
30
includes an inside seat
31
and an outside seat
32
. The inside seat
31
includes an outer threading
312
having two diametrically disposed flat surfaces
311
. The outside seat
32
includes an outer threading
321
having diametrically disposed flat surfaces
322
.
The inside rose liner
42
includes two diametrically disposed flat sections
421
in an inner periphery defining a hole
420
thereof. The inside rose liner
42
further includes two diametrically arranged positioning holes
422
through which screws
43
are extended. The inside rose liner
42
is mounted around the inside seat
31
with the flat sections
421
of the inside rose liner
42
being in contact with the flat surfaces
311
of the inside seat
31
.
The anti-torque ring
44
includes two diametrically disposed flat sections
442
in an inner periphery defining a hole
440
thereof. Two lugs
441
are formed on the anti-torque ring
44
and two positioning posts
45
respectively project from the lugs
441
and extend along a longitudinal direction of the anti-torque ring
44
. The anti-torque ring
44
is mounted around the outside seat
32
with the flat sections
442
being in contact with the flat surfaces
322
of the outside seat
32
. In addition, a screw hole
451
in each positioning post
45
is aligned with an associated positioning hole
422
in the inside rose liner
42
. Screws
43
are extended through the positioning holes
422
of the inside rose liner
42
and the screw holes
451
in the positioning posts
45
. The pull-resisting ring
46
includes an inner threading
461
so as to be engaged with the outer threading
312
of the inside seat
31
.
The outside rose liner
50
includes an inner threading
51
so as to be engaged with the outer threading
321
of the outside seat
50
. Formed on a side
500
of the outside rose liner
50
that abuts against the outside seat
32
is an annular recessed portion
52
for receiving the antitorque ring
44
. The annular recessed portion
52
includes two recess extensions
53
which are preferably diametrically arranged. The recess extensions
53
are provided to receive the lugs
441
of the anti-torque ring
44
. The outside rose liner
50
is securely mounted inside the outside rose
54
to move therewith.
The outside handle
55
includes an end
551
that is extended through the outside rose
54
. A lock core
552
is mounted in the end
551
of the outside handle
55
and extended into the outside spindle
24
. The inside handle
40
includes an end
401
that is extended through the inside rose
41
. When either spindle
40
or
55
is turned, the retractor
21
is moved inward to retract the latch bolt
22
away from an opening (not shown) defined in a door frame (not shown), which is conventional and therefor not further described.
Referring to
FIGS. 1 and 3
, when mounting the door lock of the present invention to a thin door
56
, the anti-torque ring
44
is moved away from the outside rose liner
50
such that the lugs
441
of the anti-torque ring
44
are disengaged from the recess extensions
53
of the outside rose liner
50
. When the outside rose
54
is turned, and the outside rose liner
50
securely mounted in the outside rose
54
is also turned. By means of turning the outside rose
54
, the outside rose liner
50
and the outside rose
54
move longitudinally relative to the outside seat
32
due to threading engagement
321
and
51
. Thus, position of the outside rose liner
50
and the outside rose
54
can be adjusted to suit the thickness of the door
56
. The main body
10
is inserted into a hole
561
in the door
56
. The positioning posts
45
of the anti-torque ring
44
are extended through positioning holes
562
in the door
56
. An outer side of the anti-torque ring
44
bears against a bottom wall (not labeled) defining the annular recessed portion
52
with the lugs
441
positioned in the recess extensions
53
, respectively. The retractor
21
is located in a center of the door thickness and thus faces the opening in the door frame. The inner rose liner
42
is then mounted to the inside seat
31
and the screws
43
are extended through the holes
422
in the inside rose liner
42
and the screw holes
451
in the positioning posts
45
. Next, the pull-resisting ring
46
is mounted to the inside seat
31
, and the inside rose
41
and the inside handle
40
are mounted to finish the assembly procedure. It is appreciated that the outside rose assembly (including the outside rose
54
and the outside rose liner
50
) has increased anti-torque effect, as the outside rose
54
and the outside rose liner
50
are secured together and the anti-torque ring
44
is positioned in the annular recessed portion
52
of the outside rose liner
50
.
FIG. 4
shows mounting of the door lock of the present invention to a thick door
57
. The installation procedure is identical to that for a thin door
56
. Thus, when mounting the door lock to a door, the locksmith or the user may simply rotate the outside rose
54
to adjust the position of the outside rose
54
and the outside rose liner
50
to suit the door thickness. The outside rose
54
and the outside handle
55
need not to be detached, which is quite convenient.
As illustrated in
FIGS. 3 and 4
, the lugs
441
of the anti-torque ring
44
are positioned in the recess extensions
53
of the outside rose liner
50
. Namely, the anti-torque ring
44
is completely covered by the outside rose liner
50
. In addition, the flat sections
442
of the anti-torque ring
44
are engaged with the flat surfaces
322
of the outside seat, and the flat sections
421
of the inside rose liner
42
are engaged with the flat surfaces
311
of the inside seat
31
. All of these provide increased torque-bearing capacity, thereby lengthening longevity of the door lock.
Further, inner threading
461
of the pull-resisting ring
46
is engaged with outer threading
312
of the inside seat
31
, and the pull-resisting ring
46
bears against a side of the inner rose liner
42
. This increases strength of the door lock to prevent intentional destruction by means of forcibly pulling the outside handle away from the door. The outside rose assembly (including the outside rose
54
and the outside rose liner
50
) has increased anti-torque effect, as the outside rose
54
and the outside rose liner
50
are secured together and the anti-torque ring
44
is positioned in the annular recessed portion
52
of the outside rose liner
50
. It is noted that the overall structure of the door lock in accordance with the present invention is simple, yet the outside rose assembly is strong enough to resist torque, thereby preventing damage resulting from forcibly turning either handle
40
,
55
. Further, the rose liners in conventional door locks tend to become loosened after a term of usage or due to door slam. Such a drawback is avoided by means of provision of the inside rose liner
42
and the outside rose liner
50
under cooperation of the anti-torque ring
44
that is positioned in the annular recessed portion
52
of the outside rose liner
50
.
FIGS. 5 and 6
illustrate a modified embodiment of the invention, wherein the positioning posts
45
in the modified embodiment have no screw holes and are shorter, and the positioning hole
562
in the door
56
has an appropriate length for receiving the positioning posts
45
. In addition, the screws
43
and the positioning holes
422
of the inside rose liner
42
are omitted. In order to provide a better positioning effect, the pull-resisting ring
46
includes a plurality of annularly spaced depressions
462
on a side thereof that faces the inside rose liner
42
. The inside rose liner
42
includes two diametrically disposed protrusions
424
that may be releasably retained in two associated depressions
462
of the pull-resisting ring
46
. Thus, the pull-resisting ring
46
may be retained in an angular position relative to the inside rose liner
42
during use of the door lock.
Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.
Claims
- 1. A door lock comprising:a main body including a transmission assembly and a positioning assembly, the transmission assembly including an inside spindle, an outside spindle, a retractor, and a latch bolt, the positioning assembly including an inside seat and an outside seat, the outside seat including an outer threading; an inside rose liner mounted around the inside seat; an inside rose mounted around the inside rose liner; an anti-torque ring mounted around the outside seat and including two lugs formed thereon, two positioning posts respectively projecting from the lugs and extending along a longitudinal direction of the anti-torque ring; an outside rose liner including an inner threading that is engaged with the outer threading of the outside seat, the outside rose liner including a side with an annular recessed portion for receiving the anti-torque ring, the annular recessed portion including two recess extensions for positioning the lugs of the anti-torque ring, thereby preventing loosening of the outside rose liner; an outside rose securely mounted around the outside rose liner to rotate move therewith; an inside handle operably connected to the transmission assembly; and an outside handle operably connected to the transmission assembly; whereby rotation of the outside rose causes longitudinal movement of the outside rose and the outside rose liner relative to the outside seat to suit a thickness of a door to which the door lock is mounted.
- 2. The door lock as claimed in claim 1, wherein the inside seat includes an outer threading having two diametrically disposed flat surfaces, the inside rose liner including a hole, an inner periphery that defines the hole of the inside rose liner including two diametrically disposed flat sections, the inside rose liner being mounted around the inside seat with the flat sections of the inside rose liner engaged with the flat surfaces of the inside seat.
- 3. The door lock as claimed in claim 1, further comprising a pull-resisting ring mounted around the inside seat, the pull-resisting ring including an inner threading engaged with the outer threading of the inside seat.
- 4. The door lock as claimed in claim 1, wherein the outside seat includes an outer threading having two diametrically disposed flat surfaces, the anti-torque ring including a hole, an inner periphery that defines the hole of the anti-torque ring including two diametrically disposed flat sections, the anti-torque ring being mounted around the outside seat with the flat sections of the anti-torque ring engaged with the flat surfaces of the outside seat.
- 5. The door lock as claimed in claim 1, wherein the inside rose liner includes two positioning holes, each said positioning post including a screw hole aligned with an associated said positioning hole, further comprising two screws each extending through the associated positioning hole and the screw hole in an associated said positioning post.
- 6. The door lock as claimed in claim 3, wherein the inside rose liner includes two diametrically disposed protrusions, and wherein the pull-resisting ring includes a plurality of annularly spaced depressions for releasably receiving the protrusions, thereby retaining the pull-resisting ring.
US Referenced Citations (3)