E - Fixed Constructions – 05 – D
Patent
E - Fixed Constructions
05
D
26/182, 108/45.1
E05D 13/00 (2006.01)
Patent
CA 1326974
- 12 - TITLE WINDOW BALANCE SPRING COVER FRICTION SYSTEM ABSTRACT An extruded resin spring cover (12) extending for the full length of a resin jamb liner (10) and divided into vertical halves (14) by a longitudinal slit (15) is involved in a friction system that prevents hop or drop of a sash (13) counterbalanced between jamb liners (10). A counterbalance spring system is arranged within spring cover (12) and connected to a platform (20) that has a narrow width neck (24 or 44) extending through slit (15). A sash support portion (25, 37, or 57) of the platform is pivotally mounted outside the spring cover, and a connector portion (30, 35, or 40) of the platform is connected to the counterbalance spring system within the spring cover. Neck (24 or 44) extending through slit (15) affords the pivotal interconnection between the sash support portion and the connection portion and also contributes a fixed friction load involved in spreading the spring cover halves apart at the slit, in the region of the neck. The rest of the friction load is provided by a friction shoulder (26 or 46) on the connector por- tion engaging the inside of the spring cover and a fric- tion surface (27, 38, or 58) on the sash support portion engaging the outside of the spring cover.
594200
Milligan Patrick E.
Westfall Norman R.
Caldwell Manufacturing Company
Kirby Eades Gale Baker
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