Constant force torsion spring apparatus

Details Constant force torsion spring apparatus Constant force torsion spring apparatus

1992-08-31

1995-01-17

Graham, Matthew C.

Spring devices

Torsion

74 96, 267280, F16F 114

Patent

active

053820070

ABSTRACT:
A constant force mechanism includes a base (410), a load arm (414) pivotally connected to the base at one end, a spring arm (412) pivotally connected to the base at one end with a torsion spring (416), and a pinch roller (420) for rotationally and translationally connecting the load arm to the spring arm, wherein a load is applied to the load arm end (424) opposite the end connected to the base.

REFERENCES:
patent: 1892064 (1932-12-01), Markey
patent: 2477187 (1949-07-01), Lanchner
patent: 2563090 (1951-08-01), Woolson et al.
patent: 2782453 (1957-02-01), Schlage
patent: 3113769 (1963-12-01), Pryale
patent: 3336021 (1965-06-01), Kramer
patent: 4651583 (1987-03-01), Suzuki
patent: 4714220 (1986-09-01), Hillstrom et al.

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