Patent ID: 6142541
Filing Date: 2000-11-07
Classification: E05C,Y10S,Y10T

Abstract:
A lock securable to one window sash of a double hung window, said lock comprising:a base securable to the one window sash;a cam pivotable about a first axis relative to said base between an open position and a locking position, said cam pivoting in a first direction about said first axis when moving from said open position to said locking position and in said locking position including a portion extending from said base and adapted to cooperate with a keeper secured to the other window sash of the double hung window when said base is secured to the one window sash to lock the one window sash in a closed position relative to the other window sash;a guard member pivotable about a second axis spaced from and substantially parallel to said first axis responsive to pivoting of said cam, said guard member being movable between a guarding position when said cam is in said locking position and a retracted position when said cam is in said open position, where said guard member extends from said base to substantially overlap with said cam extending portion in said guarding position and said guard member does not substantially extend from said base in said retracted position; anda follower connection between said cam and said guard member pivoting said guard member about said second axis between said guarding position and said retracted position when said cam pivots about said first axis between said locking position and said open position, said follower connection being adapted to bias said cam toward pivoting in said first direction when a force biases said guard member toward said retracted position.