Sound-deadener for window torsion balance

Details Sound-deadener for window torsion balance Sound-deadener for window torsion balance

1992-03-16

1993-05-04

Larson, Lowell A.

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

Sash balances

Spring

16DIG6, 49445, E05D 1300, E05F 100

Patent

active

052069737

ABSTRACT:
This invention, which provides a solution to the long-standing problem of motion-related rattle in torsion balances for windows, is based upon the discovery that the major source of the rattle is related to the movement of the free end of the twisted rod that is mounted within the coil of the torsion spring. A sound-deadening element of resin material is secured to the free end of the twisted rod, being positioned proximate to the extremity of the free end, and the preferred element has a maximum dimension (measured radial to the spring) that is greater than the maximum cross-sectional dimension of the twisted rod but less than the effective internal diameter of the coiled spring. The sound-deadening element eliminates the rattle by preventing contact between the free end of the rod and the spring, and it also acts as a glide to facilitate relative movement between the rod and the spring during operation of the balance.

REFERENCES:
patent: 2580705 (1952-01-01), Tappan
patent: 2637875 (1953-05-01), Hess
patent: 2774100 (1956-12-01), Larson et al.
patent: 2776447 (1957-01-01), Addicks
patent: 2851721 (1958-09-01), Decker et al.
patent: 2877514 (1959-03-01), Mears, Jr.
patent: 2929095 (1960-03-01), Nobes
patent: 3091003 (1963-05-01), Nobes
patent: 3478384 (1969-11-01), Skolnik
patent: 4423536 (1984-01-01), Cross
patent: 4540070 (1985-09-01), Yonovich et al.
patent: 4854558 (1989-08-01), Newton

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