The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 1990
Filed:
Jan. 19, 1989
Haruo Mochida, Kanagawa, JP;
Toshikazu Kobayashi, Tokyo, JP;
Hidekazu Sato, Tokyo, JP;
Mikio Masaki, Tokyo, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Kokusan Kinzoku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
Disclosed herein is a cylinder lock which is proof against lock pickers. The cylinder lock comprises a case having a cylindrical bore formed therein and an axially extending lock groove exposed to the cylindrical bore; a rotor rotatably disposed in the cylindrical bore; a plurality of tumblers slidably received in slits formed in the rotor, each tumbler having a head which is projectable into the lock groove when the rotor assumes a given angular position relative to the case; springs for biasing the tumblers radially outward from the slits of the rotor; and a structure for making the distances by which the heads of the tumblers are projected into the lock groove of the case different from one another.