Screw-released roller brake

Details Screw-released roller brake Screw-released roller brake

1996-02-08

1999-02-09

Butler, Douglas C.

Brakes

Wheel

One-way brakes

188 821, 192 451, F16D 4107

Patent

active

058682260

ABSTRACT:
A screw-released roller brake including an input drive assembly, an output drive assembly, a plurality of locking sprags, a mechanical tripper nut for unlocking the sprags, and a casing therefor. The sprags consist of three dimensional (3-D) sprag members having pairs of contact surface regions which engage respective pairs of contact surface regions included in angular grooves or slots formed in the casing and the output drive assembly. The sprags operate to lock the output drive assembly to the casing to prevent rotation thereof in an idle mode of operation. In a drive mode of operation, the tripper is either self actuated or motor driven and is translated linearly up and down against a spline and at the limit of its travel rotates the sprags which unlock while coupling the input drive assembly to the output drive assembly so as to impart a turning motion thereto in either a clockwise or counterclockwise direction.

REFERENCES:
patent: 3443672 (1969-05-01), Giesa
patent: 3712431 (1973-01-01), Versoy
patent: 5079460 (1992-01-01), Vranish
patent: 5103941 (1992-04-01), Vranish
patent: 5275261 (1994-01-01), Vranish
patent: 5482144 (1996-01-01), Vranish
patent: 5601167 (1997-02-01), Kihoshita et al.

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