초록

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.

대표청구항 ▼

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

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.