Counterbalance device and torsion member usable therein

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Hinge – Resiliently biased hinge

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Details

16308, 16DIG36, 267 57, 267154, E05F 110

Patent

active

045717753

ABSTRACT:
A device for counterbalancing a moving part comprises an elongated torsion member surrounded by a sleeve, the sleeve being connected to the torsion member at one point and the torsion member being fixedly supported at another point spaced from said one point, the moving part and the sleeve respectively carrying cooperating elements of a cam-follower combination, the cam being shaped, taking into account the torsion characteristics of the torsion element, to produce the desired counterbalancing effect. The torsion member itself advantageously comprises a plurality of elongated narrow elements of polygonal cross-section arranged in a predetermined grouping with sides of adjacent elements engaging one another, the exposed surfaces of said elements defining at least in part a polygonal shape, operative connections to points along the length of the torsion member being effected by bodies having appropriately shaped polygonal openings into which the grouping of the narrow elements is received so as to non-rotatably engage at least some of the elements and to confine the elements so that they are maintained in that predetermined grouping. The construction of the torsion member is such that a variety of different torsion element groupings can be received within a given polygonal opening, with a still greater variation in the number of torsion elements being possible by simple modifications of those polygonal openings, so that great latitude in operating characteristics can be achieved with an essentially standardized construction.

REFERENCES:
patent: 3022536 (1962-02-01), Floehr
patent: 3276762 (1966-10-01), Thomas
patent: 3377882 (1968-04-01), Schrempp
patent: 3476375 (1969-11-01), Brasseur
patent: 4291501 (1981-09-01), Steinberg et al.
patent: 4348786 (1982-09-01), Hirose

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