US 9,528,300 B2 · Cylindrical lockset

Abstract

A cylindrical lockset comprises a multiple-compartment lock cage subassembly. A retractor is housed within a middle lock cage compartment. Spindle return torsion springs, for biasing corresponding handle-carrying spindles to their default positions, are housed within axially adjacent lock cage compartments. A torque plate transfers torque from the lock cage subassembly to relatively radially distal trim posts. A knob catch assembly seated in each handle-carrying spindle comprises a generally elliptically-shaped wrap around catch spring and a knob catch backup washer to resist axial loads produced by efforts to pull a handle off of the spindle. A key spindle provides a dog travel window defined by a closed, continuous edge of the key spindle, which window is positioned opposite of an axially-extending seam of the key spindle.

Claims20

Dependent claims

A cylindrical lock assembly comprising:

a sheet metal lock cage defining an enclosure for housing components of the cylindrical lock assembly, the lock cage configured to be inserted within a cylindrical bore of a door, the lock cage having first and second ends;
two sheet metal separator plates dividing the enclosure into a first end compartment, a second end compartment, and a middle compartment of the lock cage, wherein the separator plates are mounted in stationary relation to the lock cage;
a retractor housed within the middle compartment;
first and second spindle bearings mounted to first and second ends, respectively, of the lock cage;
first and second door handle spindles mounted within the spindle bearings;
and
at least a first spindle return torsion spring, for biasing a spindle to a non-latch-retracting position, housed within one of the first and second end lock cage compartments.

4 more elements

Dependencies are inferred from the claim text.

Cylindrical lockset

Life of this patent

Cylindrical lockset

Life of this patent

Abstract

Claims20