04936894 is referenced by 29 patents and cites 15 patents.

A lock includes a plurality of elongated buttons, each of which has on the sides thereof a plurality of gates spaced angularly and longitudinally from one another. A case contains the lock and defines a plurality of bores within which the buttons travel. The buttons are urged out a front cover of the case by biasing springs and are normally prevented from rotation by engagement with keying protrusions on the case. The lock includes a locking bolt which is coupled to a checker plate. The checker plate defines a plurality of edges that engage the sides of the buttons and are received in the gates therein only if the buttons are properly positioned.

Title
Pushbutton lock
Application Number
120584
Publication Number
4936894
Application Date
August 21, 1989
Publication Date
June 26, 1990
Inventor
John J Risko
Cottage Grove
OR, US
Wayne F Larson
Salem
OR, US
Agent
Klarquist Sparkman Campbell Leigh & Whinston
Assignee
Supra Products
OR, US
IPC
E05B 37/16
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