Lock mechanism with disengageable knob

Details Lock mechanism with disengageable knob Lock mechanism with disengageable knob

E - Fixed Constructions

05

C

292/43

E05C 1/06 (2006.01) E05B 59/00 (2006.01) E05B 13/00 (2006.01)

Patent

CA 1042037

ABSTRACT OF THE DISCLOSURE This invention relates to the field of door latch and lock mechanisms. External door locks are common targets of abuse and vandalism. In particular, latch mechanisms sometimes partially jam due to such reasons as the misalignment between the latch bolt and the stricker plate, and warped or partially obstructed doors. Additionally, normal usage of a latch mechanism generally subjects the internal parts thereof to substantial loads, separate and apart from any intention to do damage thereto. The present inven- tion thus represents an improvement over prior art lock mechanisms by providing a lock mechanism with disengageable knob form the locking of the mechanism decouples the exterior knob from the latch mechanism to allow the free rotation thereof without damage or detriment to the mechanism. The exterior knob is coupled to a cam member which actuates a spring loaded slide plate, which in turn may pick up a lock mechanism actuating member dependent upon whether the interior lock actuator is in the locked or unlocked position.

260010

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