Importance

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Abstract

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 facing 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 receiving a handle through the inner side of the escutcheon. The slot comprises an upper end and a lower end defined by upper and lower walls respectively. The handle is pivotally connected to the escutcheon by a shaft having an axis that extends transversely through the 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 arcuate gear. The movable link 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 arcuate gear enmeshed with the arcuate gear of the fixed gear. The distal end of the drive gear link also is pivotally connected to the connecting link at a connecting axis. This design enables the handle to undergo a relatively short range rotation ranging from about 100.degree. to about 140.degree. while moving the connecting axis through an arcuate path defined by an angle ranging from about 140.degree. to about 180.degree.. The handle and escutcheon present a relatively low profile on the inside surface of the sash.

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First Claim