Self-contained spring balance system

Details Self-contained spring balance system Self-contained spring balance system

1993-10-06

1999-07-20

Graham, Matthew C.

Spring devices

Coil

Including end thrust member

F16F 1500

Patent

active

059246839

ABSTRACT:
The invention pertains to a spring balance system for sliding windows. The self-contained apparatus comprises a small diameter tube (11) and a larger diameter tube (12). The two tubes are telescopic with respect to one another. A spring (15) extends through the length of both tubes. There is a frictional engagement between the two tubes. At one end there is a means (17) for attaching the apparatus to a sliding window. The other end comprises a support (13).

REFERENCES:
patent: 2577953 (1951-12-01), De Vries et al.
patent: 2729418 (1956-01-01), Maynard
patent: 3572621 (1971-03-01), Whitten
patent: 5062617 (1991-11-01), Campbell

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