Attack-thwarting cylindrical lockset
AssigneeTownsteel, Inc.
InventorsCharles W. Moon, Michael J. Wright
Life of this patent
Estimating the term…
Abstract
Mechanisms are provided to thwart an overtorquing attack on a cylindrical lockset. The cylindrical lockset comprises a lock cage, a split retractor assembly, and a torque-attack-activated spring-loaded blocker assembly coupled to the lock cage. The blocker assembly is set to a default non-blocking configuration. An overtorquing attack triggers the blocking assembly into a blocking setting. When in the blocking setting, the blocking assembly blocks movement of at least an outside door portion of a retractor assembly from translating into a latch-retracting position, but does not block the inside door handle from retracting the latch. A new split retractor assembly is also provided.
Claims17
A cylindrical lockset designed to thwart an overtorquing attack, the cylindrical lockset comprising:
- a latch;
- a lock cage configured to be mounted inside a cylindrical bore of a door that passes from an outside door face to an inside door face;
- a retractor assembly housed in the lock cage and configured to enable inside and outside door handles to retract the latch;
- a lock housed in the lock cage and operative, when activated, to prevent a person from using the outside door handle to open the door;
- and
- a torque-attack-activated blocker assembly coupled to the lock cage, the blocker assembly being coupled in a default non-blocking setting and operative to be activated by an overtorquing attack into a blocking setting;
- wherein the blocker assembly, when in the blocking setting, blocks the outside door handle from causing the retractor assembly to retract the latch.
A cylindrical lockset designed to thwart an overtorquing attack, the cylindrical lockset comprising:
- inner and outer spindles configured to receive inside and outside door handles;
- a latch;
- a lock cage configured to be mounted inside a cylindrical lock door bore that passes from an outside door face to an inside door face;
- a retractor assembly housed in the lock cage and configured to enable the inside and outside door handles to retract the latch;
- and
- a trap coupled to the lock cage, the trap operable to be activated by an overtorquing attack to prevent the outer spindle from causing the retractor assembly to retract the latch.
Dependencies are inferred from the claim text.