Patent ID: 7441371

Claim:
A window assembly comprising a frame and a sash, the frame being elongated relative to the sash and the sash being slidable to different vertical settings in the frame, said frame having side jambs with interior channels opening at the sash, each of said channels being provided with a balancing device which slides with and balances weight of said sash at the different vertical settings of the sash in the frame, said sash also being tiltable between a tilted closed position aligned with said frame and different tilted open positions angled relative to the frame, said assembly further including a control bar to limit tilting movement of said sash; said control bar having a first end attached to said sash and a second end which is slidably held within one of the channels of the frame, said frame, said sash, and said control bar all being vertically aligned with one another and said bar being sandwiched between said frame and said sash when the sash is in the tilted closed position; said control bar being secured between said sash and said one of said channels to be distorted as the sash is tilted and additionally causing the second end of the bar to slide vertically relative to the one of the channels of the frame within which the second end of the bar is slidably held without interfering with the balance device therein resulting in a horizontal tipping of the control bar as the sash is tilted open; said control bar distorting and developing a force of a magnitude as said sash is tilted open to limit the tilted open positions of said sash to inwardly and upwardly angled positions of said sash relative to said frame; and wherein said control bar is pivotally secured to a jamb-slide retained in said one channel, said control bar including a bent end segment forming a pivot shaft terminating in an angled latch segment.