Patio door lock

Details Patio door lock Patio door lock

1980-05-19

1982-12-07

Frazier, Roy D.

Closure fasteners

Bolts

Multiple

E05C 112

Patent

active

043623280

ABSTRACT:
A patio door lock having a linkage for reciprocating movable bolts in the top and bottom of the door into and out of locked positions. A six bar linkage is provided to reciprocate bolt rods connected to the bolts by axially directed forces. A tension spring biases the bolt rods together, and stops are provided to limit an over-center motion of the linkage as assisted by the tension spring, one stop holding the linkage and bolt bars in the locked position.

REFERENCES:
patent: 652279 (1900-06-01), Lauer
patent: 998642 (1911-07-01), Shean
patent: 1090057 (1914-03-01), Hill
patent: 1282115 (1918-10-01), Older
patent: 1387573 (1921-08-01), Wilson
patent: 1460991 (1923-07-01), Van Alstyne
patent: 1593435 (1926-07-01), Carter
patent: 2989859 (1961-06-01), Eads
patent: 3245237 (1966-04-01), Eads et al.
patent: 3413933 (1968-12-01), Shook
patent: 3633389 (1972-01-01), Horgan, Jr.
patent: 3768847 (1973-10-01), Buck, Jr.
patent: 4088353 (1978-05-01), Meyer
patent: 4120524 (1978-10-01), Buck, Jr.
patent: 4165894 (1979-08-01), Wojciechowski

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