Releasable latch for plastic molded clamshell parts

Details Releasable latch for plastic molded clamshell parts Releasable latch for plastic molded clamshell parts

1999-04-13

2000-08-22

Dayoan, B.

Closure fasteners

Bolts

Swinging and camming

292202, 220318, E05C 304

Patent

active

061060348

ABSTRACT:
A rotary latch for a clamshell housing with truncated circular upper and lower lugs, that can if desired, be made in a single plastic molding and rotatably attached to the housing without any rivets, pins or screws. The upper lug has an arcuate extent of more than 180 degrees and the lower lug has an arcuate extent coaxial with the upper lug but less than 180 degrees. The latch is an annular plastic body that is deformed to snap over and rotatably mount on the upper lug, effected by an annular recess in the body that extends 360 degrees inside around the body so as the body rotates on the upper lug, it never loses contact over any portion thereof. The lower lug is axially offset from the upper lug and the latch body has a latch cup portion that scoops and aligns the lower lug with the upper lug in three orthogonal coordinates. The latch cup portion is also axially offset from the upper lug so it can pass behind the upper lug as the latch body is rotated from a latch position to a release position.

REFERENCES:
patent: 974116 (1910-11-01), Bray
patent: 1201722 (1916-10-01), Halteman
patent: 2301078 (1942-11-01), Perron
patent: 4290633 (1981-09-01), Sullivan
patent: 4351448 (1982-09-01), Ingersoll
patent: 4807914 (1989-02-01), Fleming
patent: 4973092 (1990-11-01), Godbe
patent: 5042855 (1991-08-01), Bennett
patent: 5462015 (1995-10-01), Murphy

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