Pin tumbler lock

Details Pin tumbler lock Pin tumbler lock

1987-09-16

1989-08-15

Smith, Gary L.

Locks

Operating mechanism

Key

70375, 70378, 70419, 70493, E05B 2704

Patent

active

048563099

ABSTRACT:
A pin tumbler lock comprises a cylindrical shell, a plug fitted within the shell, and rotatable by key means. The plug has first bores for receiving first pin tumblers. The first bores are substantially normal to the axis of the plug. The shell has second bores for receiving second pin tumblers therein. The second bores are aligned with first bore. First and second pin tumblers are located in bores. The second pin tumblers are forced by a spring into the aligned first bores to thereby prevent rotation of the plug. The first and second pin tumblers have substantially mating surfaces at respective ends providing contact along their entire length. The plug includes two grooves in a plane normal to the axis of the plug along its periphery, one groove on each side adjacent to first bores, thereby providing a non-linear shear line between the plug and the shell.

REFERENCES:
patent: 1739964 (1929-12-01), Hainline
patent: 2043205 (1936-06-01), Thompson
patent: 2194469 (1940-03-01), Fremon
patent: 2281714 (1942-05-01), Rauh
patent: 2283489 (1942-05-01), Crousore
patent: 2565531 (1951-08-01), Spiegler
patent: 2596720 (1952-05-01), Pastor et al.
patent: 2629249 (1953-02-01), Mendelsohn
patent: 3393542 (1968-07-01), Crepinsek
patent: 3731507 (1973-05-01), Wolter
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patent: 4068508 (1978-01-01), Genakis
patent: 4068509 (1978-01-01), Genakis
patent: 4098103 (1978-07-01), Raskevicius
patent: 4107966 (1978-08-01), Schlage
patent: 4142389 (1979-03-01), Bahry et al.
patent: 4151731 (1979-05-01), Tucker
patent: 4577479 (1986-03-01), Widen
patent: 4631942 (1986-12-01), Sierra
patent: 4655063 (1987-04-01), Foshee et al.

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