Truth Hardware Corporation

Perry L Virkler

Gregory J Vetter

Valerie M Baldwin

Thomas J Midas

David R VonWald

An operator for controlling the movement of a window sash relative to a frame, including a base attachable to a frame; a linkage secured to the base and attachable to a window sash to control the movement of the window sash relative to a frame; a rotatable input shaft rotatably secured to the base and driveably engaging the arm, the input shaft having a female drive region formed therein; a drive member; a transmission shaft secured on one end to the drive member and having a male drive region disposable within and mateable with the input shaft female drive region to transfer rotation of the transmission shaft to the input shaft; and means for locking the transmission shaft to one of the base and the input shaft to hold the male drive region in mateable engagement with the female drive region.

Window operator with locking worm drive system

Outer surface of a window operator housing

Outer surface of an operator housing

Operator handle

A track securable to a window sash for guiding the roller of a window operator having an operator arm selectively pivotable relative to a window frame to move the sash relative to said frame, the arm having the roller at its distal end. The track includes two substantially parallel spaced longitudinal walls connected by a longitudinal wall substantially perpendicular to and extending between the parallel walls, an operator roller being receivable between the parallel walls. An integral stop is stamped in the connecting wall, and includes a non-planar portion angled at one end from the connecting wall into the space between the parallel walls, and an arcuate end surface extending in a direction substantially perpendicular to the path of roller travel from the other end of the non-planar portion to substantially adjacent the connecting wall. A second stop is similarly stamped in the connecting wall but facing in the opposite direction of the first stop, whereby the two stops allow for use of the track in either left handed or right handed window sash installation.

Window operator track with integral limit stop

Growing community of inventors

Owatonna, MN, United States of America

Perry L Virkler