Locking shoe and mounting bracket for curl spring window...

Details Locking shoe and mounting bracket for curl spring window... Locking shoe and mounting bracket for curl spring window...

2007-01-29

2010-06-15

Batson, Victor (Department: 3677)

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Sash balances

C016S197000

Reexamination Certificate

active

07735191

ABSTRACT:
A curl spring sash shoe cassette improves upon the suggestions of U.S. Pat. Nos. 5,353,548 and 5,463,793 by providing a mounting bracket that holds an uncurled length of the curl spring and is securely mounted on top of the shoe cassette to maintain an assembly of the shoe body, the curl spring, and the mount during shipment to a window manufacturer. The mount can receive two mounting screws to resist torque caused by curl springs and sash weight. The shoe is also improved to facilitate removal and reinsertion of sash pins into the tilt lock cams of the shoes and ensure that shoe body halves do not rotate relative to each other when sash tilting splays the body halves apart to lock them in a shoe channel.

REFERENCES:
patent: 2732594 (1956-01-01), Adams et al.
patent: 5353548 (1994-10-01), Westfall
patent: 5463793 (1995-11-01), Westfall
patent: 5661927 (1997-09-01), Polowinczak et al.
patent: 6990710 (2006-01-01), Kunz et al.
patent: 2004/0163209 (2004-08-01), Pettit

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