Continuously adjustable rotary bias device

Details Continuously adjustable rotary bias device Continuously adjustable rotary bias device

1991-08-16

1992-09-22

Bui, Thuy M.

Endless belt power transmission systems or components

Means for adjusting belt tension or for shifting belt,...

267154, 464 88, F16H 708

Patent

active

051493055

ABSTRACT:
A resilient rotational bias device that is continuously adjustable to supply any preselected rotational bias force to a shaft, within a wide range, by rotation of a multi-step shaft retention member, usually a gear, by a simple drive such as a worm gear that engages the shaft retention member; the shaft retention member an the drive are mounted in a housing that is affixed to one end of a resilient torsion member, the other end of the torsion member being affixed to a stationary frame. All elements of the device other than the torsion member, but including a connector for connecting the shaft retention member to the end of a biased shaft, are mounted in the housing. All elements of the device, except a drive shaft for th worm gear, are usually formed of the same molding resin, preferably polyurethane.

REFERENCES:
patent: 4171920 (1979-10-01), Kramer et al.
patent: 4533036 (1985-08-01), Gordon
patent: 4854443 (1989-08-01), Gordon
patent: 4925434 (1990-05-01), Swinderman
patent: 4995851 (1991-02-01), Taylor et al.
patent: 5088965 (1992-02-01), Swinderman et al.

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