Patent ID: 6014878
Filing Date: 2000-01-18
Classification: E05B,Y10S,Y10T

Abstract:
A lock comprising an inside handle assembly having a push button and a tail piece operably connected to the push button, an outside handle assembly, a latch assembly with a latch bolt, and a chassis having a retractor mounted therein for retracting the latch bolt, the outside handle assembly comprising:an outside lever handle;an outside handle spindle secured to the outside lever handle to rotate therewith and including a first slot defined in a periphery thereof;an actuating spindle mounted in the outside handle spindle and operably connected to the retractor, the actuating spindle including a second slot defined in an upper side thereof and aligned with the first slot of the outside handle spindle;a catch mounted in the actuating spindle and having a first end pivoted to the actuating spindle and a second end, the first end of the catch further including a hooked portion, the second end of the catch including a block formed on an upper side thereof and an arcuate recess defined in an underside thereof to thereby define a sharp end edge;a tapping means slidably mounted in the actuating spindle and including a tapping section for releasably engaging with the hooked portion of the catch, the tapping means further including a protruded section for releasably engaging with the second end of the catch, the tapping means being connected to the tail piece to move therewith; anda spring mounted in the actuating spindle for biasing the tapping section of the tapping means away from the hooked portion of the catch;wherein when the lock is in an unlocked status, the tapping section of the tapping means disengages from the hooked portion of the catch under the action of the spring while the protruded section of the tapping means engages with the sharp end edge of the second end of the catch such that the block is moved upwardly through the second slot of the actuating spindle into the first slot of the outside handle spindle, thereby allowing synchronous rotational movements of the outside handle spindle and the actuating spindle; andwherein when the push button is pressed, the tapping means is moved toward the outside lever handle and compresses the spring such that the tapping section of the tapping means engages with the hooked portion of the catch and thus pivots the catch during the sliding movement of the tapping means to move the second end of the catch downwardly, such that the block of the catch disengages from the first slot of the outside handle spindle while the arcuate recess of the second end of the catch engages with the protruded section of the tapping means to allow free rotational movement of the outside lever handle.