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:
Mar. 24, 1987
Filed:
Jan. 30, 1986
Walter R Evans, Lancaster, KY (US);
Sargent & Greenleaf, Inc., Nicholasville, KY (US);
Abstract
A cylinder lock of the rotary disc tumbler and pin tumbler type having an outer cylindrical shell casing, a plug assembly in the said casing including an inner shell member rotatable therein forming a shear line between the casing and shell member and a stack of locking disc tumblers within the shell member. The casing houses a plurality of elongated, axially slidable segmented pin tumblers biased toward the disc tumblers each having a separation line intermediate its length. The disc tumblers each have a stepped bottom peripheral gate alignable with and adapted to receive adjacent portions of the pin tumblers therein to various depths causing pin tumbler portions spaced from said separation line to cross the shear line in a locked position of the plug assembly and are movable by key rotation of the disc tumblers to align their separation lines with the shear line to unlock the plug assembly for rotation.