Patent ID: 7510221
Filing Date: 2009-03-31
Classification: E05B,E05C,Y10S,Y10T

Abstract:
1. A sash lock assembly for a sash window assembly, the sash window assembly having an upper sash window and a lower sash window slidable within a master frame, the upper sash window having a keeper connected thereto, the sash lock assembly comprising: a housing adapted to be mounted on the lower sash window, the housing having an opening therein; a cam positioned within the housing; an actuator handle extending through the opening in the housing and connected to the cam such that the actuator handle and the cam rotate together in a generally horizontal plane, the actuator handle rotatable to adjust the sash lock assembly between a locked position, wherein the cam is adapted to engage the keeper, and an unlocked position, wherein the cam is adapted to disengage from the keeper; and an anti-rotation device comprising a protrusion positioned on the housing, wherein when the sash lock assembly is in the locked position, the protrusion engages an engaging surface on the actuator handle to prevent rotation of the actuator handle, and wherein upon generally vertical deflection of the actuator handle when the sash lock assembly is in the locked position, the engaging surface moves to clear the protrusion, permitting movement of the actuator to place the sash lock assembly in the unlocked position.