Top-and-bottom latch lock

Details Top-and-bottom latch lock Top-and-bottom latch lock

2006-03-21

2006-03-21

Barrett, Suzanne Dino (Department: 3676)

Locks

Special application

For closures

C070S109000, C292S034000

Reexamination Certificate

active

07013688

ABSTRACT:
A top-and-bottom latch lock includes symmetrical L-shaped control rods provided with pressing portions for connecting to springs. The ends of the control rods are configured with braking pieces provided with bumps, and symmetrical gulfs are defined in a flat member to accommodate the bumps of the braking pieces. A turning axis having an opening is disposed above the flat member, and an oscillating shaft is disposed below the flat member. Accordingly, the control rods are extended outward or contracted inward through turning of a rotation body, a key or handles of the lock, thereby locking or opening a door.

REFERENCES:
patent: 1596992 (1926-08-01), Ognowicz
patent: 1646674 (1927-10-01), Angelillo
patent: 3953061 (1976-04-01), Hansen et al.
patent: 5265920 (1993-11-01), Kaup et al.
patent: 5498038 (1996-03-01), Simon et al.
patent: 5782114 (1998-07-01), Zeus et al.
patent: 5901989 (1999-05-01), Becken et al.
patent: 6007114 (1999-12-01), Hotzl

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