Gravity balancing device for rocking arm

Details Gravity balancing device for rocking arm Gravity balancing device for rocking arm

1983-04-26

1986-06-03

Siemens, Terrance L.

Material or article handling

Vertically swinging load support

Shovel or fork type

901 48, 267 71, B25J 1900

Patent

active

045926972

ABSTRACT:
A gravity offsetting device for offsetting the gravitational moment of a rocking arm, mounted between a fixed point located above a pivotal point of the rocking arm at a predetermined distance a and substantially in vertical alignment therewith, and an arbitrary point on the rocking arm, the gravity balancing device including: a compression spring having a spring constant k of a value corresponding to the load W at the arbitrary point as divided by the distance a, and a free length corresponding to the sum of the length l between the fixed and arbitrary points and the initial set length l.sub.s of the compression spring, and adapted to apply a counterbalancing tensile force varying in proportion to the distance between the fixed and arbitrary points.

REFERENCES:
patent: 2995327 (1961-08-01), Wood
patent: 3148870 (1964-09-01), Suommo
patent: 3151857 (1964-10-01), Falkenberg
patent: 4359308 (1982-11-01), Nakajiima
patent: 4383455 (1983-05-01), Tuda et al.
patent: 4500251 (1985-02-01), Kiryu et al.

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