Chain hoist with a brake acting on both sides of the clutch

Details Chain hoist with a brake acting on both sides of the clutch Chain hoist with a brake acting on both sides of the clutch

1996-02-27

1999-05-04

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

254372, 254362, 254347, 192 90, 475149, 475331, B66D 114

Patent

active

058994416

ABSTRACT:
In an electric chain hoist, there is a slipping clutch in the drive line which connects the electric motor to the chain sprocket, the slipping clutch acting as an overload safeguard. A holding brake is also provided to hold the drive line in the braked state when the motor is switched off. The brake exerts its braking action primarily on that part of the drive line which lies between the slipping clutch and the chain sprocket. To prevent the slipping clutch from entering the slipping state when the motor is switched on before the brake has been released to a sufficient extent, the brake is designed in such a way that it acts on both parts of the drive line.

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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