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US 9,909,339 B2Granted
High-security cylinder lock based on bridge tumblers
OwnerDerek Baverinventor
Life of this patent
Estimating the term…
Abstract
A bridge tumbler lock has tumblers that both slide and pivot, with their motion controlled by pairs of key interfaces. A sidebar is released to permit lock opening movement when all tumblers are in their correct positions. This results in a lock that is resistant to release of information due to partially correct key combinations occurring in the course of a lock picking attempt and thus enables enhanced security in an economical, effective lock construction.
Claims13
A cylinder lock comprising:
- (a) a cylinder having an entry passage for key insertion,
- (b) one or more rotatable substantially flat surfaced tumblers with a shield form substantially planar body portion that, in response to insertion into said passage of a conventional key with upper or lower edge profiled surface, can respond to contact with said surface to slide linearly in a plane and can also rotate, to regulate alignments for enabling cylinder rotation for locking and unlocking,
- (c) each tumbler having its axis of rotation perpendicular to its direction of sliding and constructed and arranged to have its direction of sliding constrained by a central outward projection from the body portion of the tumbler that is rotatably journaled within a suitable groove in the cylinder.
Dependencies are inferred from the claim text.