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US 4,624,073 AGranted
Locking tilt window sash and lock therefor
AssigneeTraco
InventorRobert P. Randall
Life of this patent
Estimating the term…
Abstract
A tilting window sash having a lock pin intermediate the ends of the vertical stiles which supports perpendicular loads to prevent inward bowing of the sash and which automatically releases upon normal lifting and/or tilting of the sash.
Claims17
In a window unit having at least one tilt window sash which is vertically slidable with respect to the window jamb to open and closed positions, said sash comprisng:
- a frame including a pair of laterally spaced, vertically coextensive stiles;
- pivot means adjacent the bottom of each respective stile to support said sash for vertical sliding and for tilting with respect to said jamb;
- latch means adjacent the top of each respective stile to support said sash for vertical sliding with respect to said jamb, said latch means being selectively releasable to permit tilting of said sash about said pivot means;
- lock means carried by the respective said stiles longitudinally intermediate the respective said pivot means and said latch means;
- said lock means being engageable in interlocking engagement with the window jamb when said sash is closed to support said stiles with respect to said jamb under force components directed generally perpendicularly to said sash;
- and
- said lock means being operable in response to initial movement of said sash to disengage from said jamb and permit tilting of said sash, and to re-engage said jamb in locking engagement therewith in response to return of said sash to its closed position.
4 more elements
An automaticallly operable lock for providing selective locking engagement between a stile of a tilting, vertically movable window sash and a window jamb comprising:
- an elongated clip adapted to be received by such a stile to define therein an open ended recess extending laterally into such stile away from such window jamb;
- an elongated locking pin received within said recess and including a portion which projects toward such window jamb;
- a spring bias means which is operable to bias said locking pin outwardly of said recess to maintan said portion thereof in position for locking engagement with such window jamb;
- said portion of said locking pin including a locking surface portion for locking engagement with such jamb, a first actuator surface portion which is cooperable with such window jamb in response to initial tilting or vertical movement of such sash to overcome the bias of said spring and thereby release said locking engagement, and a second actuator surface portion which is cooperable with said jamb in response to movement of such sash from a tilted to a non-tilted orientation to overcome the bias of said spring and thereby permit said locking pin to re-engage such jamb for locking engagement therewith when such sash is closed.
1 more element
Dependencies are inferred from the claim text.