Patent ID: 9528300
Filing Date: 2016-12-27
CPC Classification: E05B,E05C,Y10T

Claim Text:
1. 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.