Attack-Thwarting Cylindrical Lockset

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.

A cylindrical lockset comprising:

• inner and outer spindles configured to receive inside and outside door handles;
• a latch;
• a latchbolt assembly;
• 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 mounted in the lock cage and constrained for translational movement along a longitudinal axis of the latchbolt assembly, the retractor assembly comprising an inner cam-activated retractor and an outer cam-activated retractor, the outer cam-activated retractor configured to press the inner cam-activated retractor to retract the latch.