Winch mechanism

Details Winch mechanism Winch mechanism

1979-04-03

1980-09-23

Christian, Leonard D.

Implements or apparatus for applying pushing or pulling force

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

Device includes rotatably driven, cable contacting drum

60347, B66D 148

Patent

active

042238714

ABSTRACT:
A winch mechanism of the surface compensating type for lifting objects from the surface of the sea comprises two or more variable pressure constant displacement hydraulic pump/motors coupled to drive a rope haulage mechanism; a pump connected for pumping operating fluid to the hydraulic pump/motors; a fluid accumulator branched from the high pressure fluid supply line from the pump to the pump/motors; and first and second non-return valves. The first non-return valve is in the high pressure fluid supply line between the fluid accumulator and the pump/motors to limit the flow of fluid from the accumulator to one only of the pump/motors, and the second non-return valve is between the high pressure fluid line and a low pressure fluid return line to permit the other pump/motor(s) to act as a pump.

REFERENCES:
patent: 3481584 (1969-12-01), Conry et al.
patent: 3817033 (1974-06-01), Appel et al.
patent: 4025055 (1977-05-01), Strolenberg

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