Combination lock construction

Details Combination lock construction Combination lock construction

1996-01-11

1998-02-10

Boucher, Darnell M.

Locks

Portable

Padlocks

70312, 70334, 70 52, 70 51, E05B 3702

Patent

active

057157090

ABSTRACT:
By forming a plurality of false void zones in a lock housing in association with the tumbler release channel, a combination lock construction is attained which virtually eliminates the ability of trained individuals to gain unwanted access to the lock. Preferably, the combination lock housing also incorporates a plurality of non-releasing open or void zones or slots formed in association with the lock release groove for each rotatable tumbler sleeve. In this way, the desired false click is provided for each rotatable dial in order to thwart unwanted opening of the combination lock of this invention. Furthermore, the lock construction of the present invention is constructed with the interior chambers thereof virtually sealed from ambient surroundings, thereby preventing unwanted contamination from entering the interior of the lock and the rotating components thereof. In this way, degradation by contamination is virtually eliminated. Finally, the present invention preferably employs a minimum number of components in combination with a housing and a movable shackle in order to provide the desired, unique combination lock construction of this invention. As a result, a cost effective, high quality combination lock is attained.

REFERENCES:
patent: 589844 (1897-09-01), Lownes
patent: 1348234 (1920-08-01), Mock et al.
patent: 1356314 (1920-10-01), Sabbag
patent: 1522851 (1925-01-01), Wright
patent: 1580573 (1926-04-01), Schara
patent: 3386271 (1968-06-01), Morin
patent: 3410121 (1968-11-01), Morin
patent: 3720082 (1973-03-01), Feinberg et al.
patent: 4444029 (1984-04-01), Remington
patent: 4733548 (1988-03-01), Ling

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