Safety winch

Details Safety winch Safety winch

1993-01-04

1994-09-06

Stodola, Daniel P.

Implements or apparatus for applying pushing or pulling force

Apparatus for hauling or hoisting load, including driven...

Device includes rotatably driven, cable contacting drum

254366, 254368, 254375, B66D 316

Patent

active

053441214

ABSTRACT:
A winch, for example, for winding in and paying out a cable attached to a person in a hazardous situation, for example underground, comprises a pair of axles mounted on a frame, one of the axles carrying the cable drum for rotation therewith. Two safety brakes are provided, one on each axle, and each including a cam actuated clutch so that rotation of the drum in the pay-out direction is only allowed when the axles are driven in the pay-out direction. A handle for driving the axles includes two hand grasp portions for different mechanical advantage. The handle can be located at two different positions on a drive sprocket on one of the axles or on a second drive sprocket freely rotatable on the first axle for different drive ratios.

REFERENCES:
patent: 485515 (1892-11-01), Uhlig
patent: 2282634 (1942-05-01), Young
patent: 2339449 (1944-01-01), Ashton
patent: 2351654 (1944-06-01), Anderson
patent: 2356371 (1944-08-01), Anderson
patent: 2630298 (1953-03-01), Hoehn
patent: 2690240 (1954-09-01), Schroeder
patent: 2703162 (1955-03-01), Keim et al.
patent: 3776514 (1973-12-01), Eggleton, Jr. et al.
patent: 4046235 (1977-09-01), Shutt
patent: 4438904 (1984-03-01), White
patent: 4664357 (1987-05-01), Nishimura

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