Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Sash balances – Spring
Patent
1992-02-18
1992-10-27
Sipos, John
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Sash balances
Spring
267156, 49445, E05D 1300
Patent
active
051578085
ABSTRACT:
An improved coil spring counterbalance assembly embodying a coil spring support structure that provides a cooperatively radiused restraining shoe against which the uninterrupted smooth external circumferential surface of the coil spring ribbon rotationally operates in extension and retraction thereof during counterbalanced sash movement, thereby eliminating both the clicking sound and spring rotational cyclic vibrational shocks otherwise caused by the spring interior ribbon core tail ending riding over the top of a spring core support hub, in addition to a multiple coil spring connection method for improved successive affixment of extended coil spring ribbons one to the other and in turn to the sash attached balance shoe connector therefor when more than on coil spring is required in order to effect proper sash counterbalancing.
REFERENCES:
patent: 2732594 (1956-01-01), Adams et al.
patent: 2817872 (1957-12-01), Foster
patent: 3150420 (1964-09-01), Brenner
patent: 3452480 (1969-07-01), Foster
patent: 3475865 (1969-11-01), Arnes
patent: 4227345 (1980-10-01), Durham, Jr.
patent: 4935987 (1990-06-01), Sterner, Jr.
Cudo Carmine
Learned Jr. Samuel M.
Product Design & Development Inc.
Sipos John
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