Adjustable elastomer torsion device

Details Adjustable elastomer torsion device Adjustable elastomer torsion device

1994-06-20

1995-05-23

Butler, Douglas C.

Spring devices

Torsion

267277, 267279, F16F 114

Patent

active

054174074

ABSTRACT:
An adjustable elastomer torsion device includes a base member aligned in partially nested relation with a resilient elastomer (e.g. rubber or urethane resin) torsion member; parts of the base member and the torsion member overlap each other and an extension portion of the torsion member projects beyond the base member. The base member and the torsion member are interlocked, where they overlap each other, to prevent relative twisting between them, but the interlock does not interfere with twisting of the torsion member extension. An adjustment mechanism provides for adjustment of the positions of the base and torsion members relative to each other to vary the length of the extension portion of the torsion member over a given displacement length and thereby adjust the elastomeric, resilient torsional restoration force (torsional resistance) of the device within a predetermined force range. In some versions, the base member is a resilient elastomer, so that some twisting occurs in the base member; in others the base member does not twist preceptibly.

REFERENCES:
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patent: 4533036 (1985-08-01), Gordon
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patent: 4925434 (1990-05-01), Swinderman et al.
patent: 5149305 (1992-09-01), Gordon
patent: 5201402 (1993-04-01), Mott
patent: 5222589 (1993-06-01), Gordon

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