High security rotary disc, pin tumbler type cylinder lock
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 24, 1987
Issued Date -
N/A
app pub date -
Jan 30, 1986
filing date -
Jun 18, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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