Patent ID: 8567830
Filing Date: 2013-10-29
Classification: E05B,E05C,Y10T

Abstract:
1. An auto cam lock, comprising: a housing, said housing configured to mount to a sash window, said housing comprising a cavity, said housing comprising a base cam stop pin and a base projection protruding into said cavity; a handle member, said handle member comprising a shaft configured to be pivotally received within a hole in said housing, said shaft comprising a projection configured to extend outward from said shaft into said housing cavity; a cam, said cam configured to pivot about an axis within said housing cavity between a retracted position, and an extended position where a portion of said cam protrudes out from an opening in said housing, said cam comprising a groove in the top of said protruding portion, said cam comprising a hole concentric with said cam pivot axis, said hole configured to pivotally receive said shaft of said handle member, said cam comprising a handle guide slot in the top of said cam, being substantially concentric with said cam pivot axis, said handle guide slot configured to receive said projection of said shaft with said projection being movable therein, said cam thereby configured to be driven from the extended cam position to the retracted cam position by contact between said shaft projection and an end of said handle guide slot; said cam comprising a cam stop pin, an end of said cam stop pin configured to engage a side of said base cam stop pin to releasably retain said cam in the retracted cam position; a cam resilient means, said cam resilient means configured to normally bias said cam to rotate from the retracted cam position to the extended cam position; an actuator, said actuator configured to pivot about an axis within said housing cavity between a retracted position, and an extended position where a tongue of said actuator protrudes out from said opening in said housing; said actuator comprising an arm, said tongue configured to be engaged by contact with a keeper, when said actuator is in said extended position, to thereby be driven to pivot to said retracted actuator position, with a side of said arm configured to thereby engage a side of said base projection to be driven centrifugally into contact with a side of said cam stop pin, to cause said end of said cam stop pin to disengage from said side of said base cam stop pin, to permit said cam spring to bias said cam into the extended cam position; and an actuator resilient means, said actuator resilient means configured to normally bias said actuator from the retracted actuator position to the extended actuator position, said arm of said actuator configured to deform to be lifted over a top portion of said base projection during said biased pivotal travel of said actuator from the retracted actuator position to the extended actuator position.