Patent ID: 6705138
Filing Date: 2004-03-16
Classification: E05B,Y10T

Abstract:
A lock comprising:a latch; a retractor for retracting the latch; an inside handle; an inside spindle having a first end fixed to the inside handle to turn therewith and a second end, the inside spindle being operably connected to the retractor such that rotation of the inside spindle causes retraction of the latch; a locking bar extending through the inside spindle and having a first end and a second end; an inside hub for rotatably receiving the second end of the inside spindle; an outside handle; an outside spindle having a first end and a second end fixed to the outside handle to turn therewith, the first end of the outside spindle including a slot extending along a longitudinal direction of the outside spindle; an outside hub for rotatably receiving the first end of the outside spindle; a cam received in the first end of the outside spindle, the cam being movable relative to the outside spindle along a longitudinal direction of the outside spindle, the cam having an engaging notch, the cam further having an cam projecting outward therefrom, the ear of the cam being releasably engaged with the retractor such that rotation of the cam causes retraction of the latch; a sleeve received in the cam and having a first end and a second end; a lug having an arm and a zing formed on an end of the arm, the ring being so mounted to the first end of the sleeve that the sleeve is not turned when the arm is turned and that the arm and the sleeve are jointly movable along the longitudinal direction of the outside spindle, the arm extending through the engaging notch of the cam and the slot of the outside spindle, the cam and the outside spindle being turned jointly when the outside handle is turned; and an elastic element mounted between the outside handle and the cam for biasing the ear of the cam to engage with the retractor; wherein when the locking bar is moved to a locking position, the lug and the sleeve are moved away from the retractor, the cam is also moved away from the retractor such that the ear of the cam is disengaged from the retractor, allowing free rotation of the outside handle without causing retraction of the latch; wherein the first end of the sleeve includes a slot defined in an end face thereof for securely receiving the second end of the locking bar.