Locks – Portable – Padlocks
Reexamination Certificate
2000-01-14
2001-05-22
Gall, Lloyd A. (Department: 3627)
Locks
Portable
Padlocks
C070S052000, C070S387000
Reexamination Certificate
active
06233985
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is related to a coupling lock, and more particularly, to a lock that firmly secures together a base and cover without any fixing member.
2. Description of the Prior Art
A prior art of a coupling lock, e.g. that used to lock up a bike, is comprised of a base, an accommodation chamber provided in the base, and a keyway extending outwardly from and connected through said chamber to permit the insertion of a key. A block in said chamber is provided at its front end with multiple channels arranged in a single row, having a pin respectively provided in each of said channels. A lever protrudes outwardly from said block and is connected to a plunger at the other end of said lever and in parallel to said block. One end of said plunger fits into a recess in the lever, while the other end freely fits into the base so as to allow the insertion of a correct key tab. A plurality of holes on the key tab respectively match with corresponding pins to allow the pins to disengage from the channels for the block to move inward, in turn the plunger also moves to unlock by releasing the locking lever. Furthermore, a matching cover is provided above the base and both are provided with holes to accept the insertion of a screw, which fixes together the base and the cover. However, the prior art coupling lock has the following defectives:
1. Relying upon the locking by the screw to tightly incorporate the base and the cover not only makes the assembling sophisticated but also is vulnerable to falling apart due to the loosening of the screw from the locking hole.
2. The single row arrangement of the channels on the block allows only variance in quantity. As a result, the combination can be easily broken.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a coupling lock allowing easy and efficient attachment of the base and the cover.
Another objective of the present invention is to provide a coupling lock comprised of a base, a matching cover, a channel provided on said cover, a catch, and a through hole provided at one side of said channel. Thus, when the cover closes upon the base, the catch is inserted into the channel. A restraint on the catch is deformed due to the compression from the cover and extends into the through hole to hook upon it, thereby firmly securing the base and the cover.
Another objective yet of the present invention is to provide a coupling lock with a locking coil chamber member provided on the base and multiple pins provided in multiple rows in the chamber member to offer more combinations than the single row arrangement of the prior art to frustrate any illegal unlocking attempts.
REFERENCES:
patent: 1382186 (1921-06-01), Godshalk
patent: 1527336 (1925-02-01), Voda
patent: 1540488 (1925-06-01), Mataloni
patent: 3435642 (1969-04-01), Del Pesco
patent: 4502305 (1985-03-01), Bakker
patent: 4831849 (1989-05-01), Kortenbrede
patent: 5146770 (1992-09-01), Yun-Sheng
patent: 5181407 (1993-01-01), Wu
patent: 5606881 (1997-03-01), Drake
patent: 5722266 (1998-03-01), Yeager et al.
patent: 6092401 (2000-07-01), Sankey et al.
patent: 44515 (1910-10-01), None
patent: 2123850 (1972-11-01), None
patent: 325346 (1930-02-01), None
patent: 400567 (1933-10-01), None
patent: 643943 (1950-09-01), None
Dougherty & Troxell
Gall Lloyd A.
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