LOCK HANDLE ASSEMBLY FOR CASEMENT WINDOWS

摘要

A lock handle assembly for a multi-point casement window is disclosed_ The lock handle assembly includes an escutcheon for mounting to the inside surface of the frame. The escutcheon includes an elongated body which features an inner side facin g away from the inside surface of the frame and an outer side that extends through the inside surface of the frame. The escutcheon further includes an elongated slot for receivin g a handle through the inner side of the escutcheon. The slot comprises an upper end an d a lower end defined by upper and lower welts respectively. They handle is pivotally connected to the escutcheon by a shaft having an axis that extends transversely through t he slot. The shaft further connects a movable link to the handle. The shaft also passes through a fixed gear which is secured to the escutcheon. The fixed gear includes an actuate gear. The movable fink includes a proximal end pivotally connected to the shaft in a distal end pivotally connected to a drive gear link. The drive gear link includes a distal end pivotally connected to a movable link and a proximate end including an actuate gear enmeshed with the actuate gear of the fixed gear. The distal end of the drive gear link al so is pivotally connected to the connecting link at a connecting axis. This design enables t hehandle to undergo a relatively short range rotation ranging from about 100.degree. to about 140.degree. while moving the connecting axis through an actuate path defined by an angle rangi ng from about 140.degree. to about 180.degree.. The handle and escutcheon present a relatively low profile on the inside surface of the sash.