Closure fasteners – Bolts – Sliding
Reexamination Certificate
2002-03-26
2003-08-26
Sandy, Robert J. (Department: 3677)
Closure fasteners
Bolts
Sliding
C292S336300, C292S201000, C292S216000, C070S277000, C070S279100, C074S625000, C074S08400R
Reexamination Certificate
active
06609736
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a motor-driven lock, and particularly to a horizontal motor-driven lock having a simple transmission device. The instant invention relates to a copending application filed on Mar. 26, 2002, with an unknown serial number and the same applicant, titled as “MOTOR-DRIVEN LOCK”.
2. Prior Art
FIG. 1
shows an exploded view of a conventional lock
20
for a door in a building. The lock
20
includes an external controller
34
, a latch subassembly (not shown), and an internal controller
22
. An inside shaft
30
and an outside shaft
32
receiving the inside shaft
30
extend through the latch subassembly, and connect the external controller
34
and the internal controller
22
. The latch subassembly is received in an opening (not shown) defined in a door (not shown), and projects sidewardly to be received in a recess (not shown) defined in a frame (not shown) of the door. The external controller
34
located at the outside of the door defines a first axial hole (not shown), for receiving the outside and inside shafts
30
,
32
. The internal controller
22
locating at the inside of the door defines a second axial hole
220
, for receiving the outside and inside shafts
30
,
32
.
The internal controller
22
includes a manual switch
221
connecting the inside shaft
30
, and a control shaft
222
connecting the outside shaft
32
. The manual switch
221
is rotatable to rotate the inside shaft
30
to actuate a pin (not shown). The pin engages with or disengages from the outside shaft
32
, thereby locking or unlocking the lock
20
. Thus, the manual switch
221
controls the lock
20
being locked or unlocked via the inside shaft
30
controlling the outside shaft
32
. The internal controller
22
rotates the control shaft
222
to control the outside shaft
32
to unlock the lock
20
. A key (not shown) is receivable in the external controller
34
, to control the outside shaft
32
to unlock the lock
20
.
However, using a key to unlock a door lock can be inconvenient, particularly at night or when one's hands are not free. A motor-driven lock can be more convenient. Even then, transmission devices of conventional motor-driven locks are complicated. Furthermore, a conventional lock is configured such that it can only be fitted to a left side or a right side of a door. Thus two configurations of a conventional lock are needed to meet the differing requirements of all kinds of doors. This unduly inflates costs. U.S. Pat. Nos. 3,767,240, 4,438,962, 4,483,162, 5,790,034, 5,857,365, 5,979,199, 6,012,310 and 6,032,991 disclose some examples.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a motor-driven lock having a simple transmission device for easy manufacturing and reduced costs.
Another object of the present invention is to provide a motor-driven lock having a transmission device that allows the lock to be fitted to a left side or a right side of a door.
To achieve the above-mentioned objects, a motor-driven lock of the present invention includes a housing defining a central hole, a lock body extending through the central hole of the housing and attached to the housing, a motor received in the housing and having a motor gear, a transmission device received in the housing and mating with the motor and the lock body, a lid attached to the housing over the transmission device, an enclosure attached to one side of the housing, and a cover attached to another side of the housing. The lock body includes a controller having a gear portion, a cap attached to the controller, and a handle extending through the cap and attached to the controller. The transmission device includes a first gearshaft meshed with the motor gear of the motor, a second gearshaft meshed with the first gearshaft, a wheel meshed with the second gearshaft, a screw shaft fixing the wheel thereon, a slider mating with the screw shaft, a yoke slidingly movable along the housing and actuatable by the slider, and a gear set. The gear set is attached to the cap of the lock body, meshed with the gear portion of the lock body, and mated with either of two racks of the yoke.
Other objects, advantages and novel features of the present invention will be drawn from the following detailed description of a preferred embodiment of the present invention with attached drawings, in which:
REFERENCES:
patent: 5857365 (1999-01-01), Armstrong
patent: 6032991 (2000-03-01), Yeh
patent: 6062612 (2000-05-01), Lin
patent: 6119538 (2000-09-01), Chang
patent: 6334636 (2002-01-01), Huang et al.
patent: 6418765 (2002-07-01), Chiu
patent: 6471257 (2002-10-01), Lu et al.
Chung Wei Te
Kinyo Co., Ltd.
Rodgers Matthew E.
Sandy Robert J.
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