Pick-resistant lock assembly
OwnerMichel Robertinventor
Life of this patent
Estimating the term…
Abstract
A pick-resistant lock assembly is provided. The lock assembly includes a housing having a main bore and a chamber including a plurality of channels holding a corresponding plurality of pin stacks, a core having a keyway and having a plurality of core openings configured to align with the channels of the housing, and a sleeve configured to fit within the main bore. The pin stacks are each configured to provide a plurality of decoy shear lines in which rotation of the core and the sleeve together is limited by a blocking position and a true shear line which permits rotation of the core and the sleeve together for actuation of the lock assembly when the true shear line is provided in each pin stack of the plurality of pin stacks.
Claims17
A pick-resistant lock assembly comprising:
- a housing having a main bore and a chamber including a plurality of channels holding a corresponding plurality of pin stacks each including a plurality of wafers;
- a core having a keyway and a plurality of core openings configured to align with the channels of the housing, the core shaped to cause removal of one or more of the plurality of wafers from each one of the plurality of pin stacks when the core is rotated;
- a sleeve having a sleeve bore to accept the core, the sleeve having a plurality of sleeve openings configured to align with the core openings and the channels, the sleeve configured to fit within the main bore;
- and
- a true key configured for insertion into the keyway to rotate the core and the sleeve together for actuation of the lock assembly,
- wherein the pin stacks are configured to (i) provide a true shear line between the sleeve and the main bore which is generated by insertion of the true key into the keyway to rotate the core and sleeve together for actuation of the lock assembly, and (ii) provide a plurality of decoy shear lines between the core and the sleeve which block rotation of the sleeve and prevent actuation of the lock assembly, and
- wherein the plurality of wafers in each pin stack of the plurality of pin stacks includes a shear wafer having a different shape or a different height dimension than remaining wafers of the plurality of wafers, wherein the true shear line is provided when the shear wafer is removed from the pin stack upon rotation of the core.
A lock assembly comprising:
- a housing having a main bore and a chamber including a plurality of channels holding a corresponding plurality of pin stacks;
- a core having a keyway and having a plurality of core openings configured to align with the channels of the housing;
- a sleeve having a sleeve bore to accept the core, the sleeve having a plurality of sleeve openings configured to align with the core openings and the channels, the sleeve configured to fit within the main bore;
- and
- a true key configured for insertion into the keyway to rotate the core and the sleeve together for actuation of the lock assembly;
- wherein the pin stacks are each configured to provide (i) a plurality of decoy shear lines in which rotation of the core and the sleeve together is limited by a blocking position provided by the pin stacks, and (ii) a true shear line which permits rotation of the core and the sleeve together for actuation of the lock assembly when the true shear line is provided in each pin stack of the plurality of pin stacks, the true shear line provided by elevation of each pin stack of the plurality of pin stacks by the true key being inserted into the keyway, and
- wherein the at least one wafer receiver is a plurality of wafer receivers located adjacent to each core opening of the plurality of core openings.
Dependencies are inferred from the claim text.