Patent ID: 8205919

Claim:
A sash lock mechanism for a sash window assembly, the sash window assembly having a lower sash window having a top rail, a bottom rail, and a pair of stiles, and an upper sash window having a keeper, the sash lock mechanism comprising: a handle; a housing adapted to be supported on a top surface of the top rail, the housing having an opening receiving the handle therethrough; a rotor coupled to the handle, the rotor moveable between a locked position and an unlocked position by movement of the handle, wherein the rotor is adapted to engage the keeper in the locked position; and a locking mechanism comprising a pivotable member pivotably connected to the housing, the pivotable member having an engagement surface thereon, wherein the pivotable member is pivotable between a first position, wherein when the rotor is in the locked position, the engagement surface confronts the rotor to prevent movement of the rotor to the unlocked position, and a second position, wherein the pivotable member does not prevent movement of the rotor and wherein the rotor is moveable by rotation about a first axis of rotation and the pivotable member is pivotable about a second axis of rotation and wherein the first axis of rotation is generally transverse to the second axis of rotation.