Rotary latch with internal bumper block

Details Rotary latch with internal bumper block Rotary latch with internal bumper block

1986-09-12

1987-11-03

Moore, Richard E.

Closure fasteners

Bolts

Swinging

292 48, E05C 316

Patent

active

047039612

ABSTRACT:
A rotary latch has a U-shaped housing that is formed as a metal stamping having a base wall that connects spaced, parallel-extending side walls. A pair of opposed jaw members are housed between the side walls, are mounted for rotation betwen latched and unlatched positions, and are arranged to embrace and latchingly retain a striker as the striker is moved into a pair of aligned notches that are defined by the side walls. A "primary" one of the jaws is biased toward its unlatched position by a housing-carried spring. A "secondary" one of the jaws is arranged to engage a resilient bumper that cushions the action of the latch as the jaws rotate to their latched positions. When the jaws are latched, the primary jaw can be rotated in opposition to the action of the spring to a release position to initiate unlatching of the latch. The jaw members have cooperative formations that interact to coordinate the latching and unlatching movements of the jaw members, to prevent the jaw members from rotating beyond a predetermined range of movement during the latching process, and to prevent unlatching rotation of the jaw members until a releasing movement of the primary jaw member has been effected. The bumper is a trapezoidal shaped block of resilient material that is mounted on the housing by extending an elongate projecting portion of the bumper through a hole that is formed in the base wall of the housing. The bumper not only cushions the operation of the latch but also cooperates with the spring to bias the jaw members toward their unlatched positions and to prevent vibratory rattling of the relatively movable parts of the latch.

REFERENCES:
patent: 4172768 (1979-10-01), Cerdan
patent: 4177656 (1979-12-01), Davis
patent: 4202571 (1980-05-01), Nishikoori
patent: 4312203 (1982-01-01), Davis
patent: 4320642 (1982-03-01), Pastva, Jr.
patent: 4457146 (1984-07-01), Weinerman
patent: 4569544 (1986-02-01), Escarovage
Eberhard Mfg. Co., Catalog No. 102, entitled "Handbook of Latches, Locks, Hinges, Handles and Related Hardware", 1983, pp. 67-68.

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