Closure fastener
AssigneePeachtree Doors, Inc.
InventorForrest L. Dunsmoor
Life of this patent
Estimating the term…
Abstract
A positive acting non-handed flush mounted fastener or lock ideally suited to casement windows and other swinging closures is provided. No parts project into the room to interfere with window hangings and when the sash or other closure is locked, no parts project into the light or sight line. A compound locking action employing a pivoted locking lever, a latch connected with the locking lever through a toggle and toggle link, and a cam track for the toggle link and latch provided in a casing for the lock develops great force to draw in or release a sash or other closure.
Claims10
A closure fastener comprising a case adapted for flush mounting in a recess formed in a closure frame, said case being of channel formation including a bottom wall and side walls, anchor elements rising from said bottom wall and spaced from said side walls, said side walls having guide slots formed therein, a lock lever adapted to lie bodily within the case and being pivoted to said anchor elements and having cam slots, a latch toggle pivotally attached to said anchor elements in spaced relationship to the pivot axis of said lock lever, a toggle link having a pivotal connection with said latch toggle and being engaged with said cam slots of the lock lever, said toggle link having trunnions, said trunnions being slidably engaged with said side wall guide slots, a latch element pivotally coupled with said trunnions and adapted to be drawn by movement of the toggle link substantially inside of said case when the lock lever is pivoted to a locking position within the case and substantially parallel to said bottom wall of the case, said latch toggle assuming a past-dead-center condition relative to the pivot axis of the lock lever when the lock lever is in said locking position, and said latch element adapted for engagement with and disengagement from a keeper element on a closure with which the closure fastener is employed.
Dependencies are inferred from the claim text.