Chain hoist with a clutch adjustable by means of the brake

Details Chain hoist with a clutch adjustable by means of the brake Chain hoist with a clutch adjustable by means of the brake

1996-02-27

1998-12-29

Walsh, Donald 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

254362, 254372, 192 90, 475331, 475149, B66D 114

Patent

active

058531653

ABSTRACT:
A chain hoist contains a slipping overload clutch in the drive line which connects the electric motor to the chain sprocket. This slipping clutch has two clutch halves which are in frictional engagement with one another and are preloaded into frictional engagement with one another by a spring. A holding brake is furthermore provided and this holding brake acts against the clutch disks so as to increase the frictional grip between the clutch disks in the applied state. This ensures that when the hoist is started and the disengagement of the brake is delayed, the slipping clutch does not enter the slipping state.

REFERENCES:
patent: 2947393 (1960-08-01), Grover
patent: 3016118 (1962-01-01), Zatsky
patent: 3399867 (1968-09-01), Schroeder
patent: 3756359 (1973-09-01), Suez et al.
patent: 3853303 (1974-12-01), Wineburner

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