LOCK HANDLE ASSEMBLY FOR CASEMENT WINDOWS

摘要

A lock handle assembly for a casement window its provided. The lock hand le assembly includes an escutcheon that includes an inner side and an outer sid e. The escutcheon is securable to the frame inside a cavity with at least a portion of the inner side of the escutcheon being disposed at the inside surface of the frame. The escutcheon also includes an upper wall and a lower wall with an elongated recess disposed there between for receiving a handle and defining the limits of rotation of the handle. Th e handle extends into the recess and is connected to a drive disk. The drive disk is pivotall y connected to a fixed gear plate thereby providing a rotational axis for the handle. The fixed gear plate is secured to an inside surface of the frame. The fixed gear plate includes an arcuate gear segment. The drive disk is also connected to a drive gear link which include s a proximal end having an arcuate gear segment enmeshed with the arcuate gear segment of the fixed gear plate and a distal end which is connected to a connecting link at the connecting axis and which is connected to a tie bar, The handle is capable of rotating throu gh an angle ranging from about 100.degree. to about 140.degree. and the connecting axis is capable of moving through an arcuate path defined by an angle ranging from about 140.degree. t o about 180.degree..