CYLINDER LOCK
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Mar 19, 2015
app pub date -
Apr 10, 2013
filing date -
Apr 25, 2012
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
In a cylinder lock, a half tumbler biased to engage an engagement portion with a locking recess of a cylinder body is inserted into a tumbler insertion hole of a rotor so that the engagement portion is retraced from the locking recess in response to insertion of a legitimate mechanical key into a key insertion hole. An inner side surface of the tumbler insertion hole is formed to include: a guide portion facing a half tumbler and extending in a moving direction of the half tumbler; and a passage forming portion having larger clearance with the half tumbler than that of the guide portion to form a release passage between the passage forming portion and the half tumbler such that the release passage faces the key insertion hole, extends in the moving direction of the half tumbler, and has opposite ends opened to an outer surface of the rotor.
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