Assa Abloy High Security Group Inc.

Samuel D Wood

Peter H Field

Walter Dannhardt

Douglas E Trent

Thomas Edwin Duckwall

Mark Benzie

Walt Dannhardt

Thomas Duckwall

A lock assembly includes a plug with a keyway, primary pins aligned with the keyway for controlling rotation of the plug, a sidebar for controlling rotation of the plug, secondary pins adjacent the keyway for controlling movement of the sidebar, and at least one supplemental sidebar control element for controlling movement of the sidebar. The lock assembly is operated by simultaneously manipulating the primary pins, the secondary pins, and the supplemental sidebar control element to place each in a respective position and/or orientation to permit rotation of the plug and to permit sufficient movement of the sidebar to permit rotation of the plug and then applying torque to the plug.

Cylinder lock with multiple, supplemental locking elements and associated key

A lock assembly includes a plug with a keyway, primary pins aligned with the keyway, a sidebar, secondary pins adjacent the keyway, and at least one supplemental sidebar control element for controlling movement of the sidebar. A key blank has a key blade with a primary top edge to receive primary bittings for controlling the primary pins, a rib to receive secondary bittings for controlling the secondary pins, and at least one shuttle pin. The shuttle pin engages a multi-level ridge within the keyway to move the shuttle pin from a retracted position to an extended position in which an end of the shuttle pin actuates the supplemental sidebar control element.

Lock cylinder and key with multiple, supplemental locking elements

Operating a lock cylinder with multiple, supplemental locking elements

Growing community of inventors

Greensboro, NC, United States of America

Samuel D Wood