Load compensator for spring counter-weighting mechanism

Details Load compensator for spring counter-weighting mechanism Load compensator for spring counter-weighting mechanism

1992-06-18

1994-05-17

Cuomo, Peter M.

Horizontally supported planar surfaces

Vertically adjustable

Shelf type

74 8922, 2482971, A47B 900, F16H 2702

Patent

active

053118278

ABSTRACT:
An improved load compensator for a spring counter-weighting mechanism including a snail cam to provide a constant counter-weight force is described. The cam provides a constant torque to a drum on which are wound cables for exerting a constant counter-weighting force. A manually operable device for altering the relative radial positions of the cam and drum varies the amount of the constant counter-weighting force. The cam is rotated with respect to the drum by a spur gear fitting within a ring gear fixed to the drum and rotated by a knob connected to an axle carrying a pinion gear engaging the spur gear.

REFERENCES:
patent: 2168209 (1937-07-01), Haupt
patent: 2924411 (1960-02-01), Rouverol
patent: 3820478 (1974-06-01), Bergenthal
patent: 4130069 (1978-12-01), Evans et al.
patent: 4351245 (1982-09-01), Laporte
patent: 4389228 (1983-06-01), Leunig
patent: 4684225 (1987-08-01), Clark et al.
patent: 4685648 (1987-08-01), Dobner et al.
patent: 4760622 (1988-08-01), Rohrman

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