Abstract: A slidable pane power window assembly for mounting in the rear window of truck cabs is disclosed. The assembly comprises a frame dimensioned to fit in the rear window opening of a truck cab and fitted with one or more fixed and slidable window panes. A slidable pane is moved horizontally into an opened and closed position by a rack and pinion drive, wherein a rack affixed to the slidable pane is engaged by a pinion powered by a motor connected to the pinion via power transmission cable. Another embodiment uses a push-pull mechanism for operating the window.

Abstract: A pair of slotted tapes made of a flexible material are slidingly disposed in opposed sides of a window frame to support corresponding side portions of a window pane. The tapes are driven downwardly or upwardly in unison along the opposed sides of the frame to open and close the window.

Abstract: A power window enclosure for replacing the cab window in trucks is disclosed. The enclosure comprises a glass windowpane housed in a substantially self contained flat rectangular enclosure having an upper portion dimensioned to fit in the cab window and defining a window opening and a lower portion containing means for raising and lowering the window. Furthermore, the windowpane is raised and lowered by a plurality of pulley lines coupled to the window pane and to a reciprocating block that selectively pulls on the lines, thereby raising and lowering the window.