Control system for hydraulic pump system

Details Control system for hydraulic pump system Control system for hydraulic pump system

1994-04-22

1995-03-21

Look, Edward K.

Power plants

Pressure fluid source and motor

Having correlated or joint actuation of controller of input...

417316, F16D 3102, F04B 3504

Patent

active

053985060

ABSTRACT:
Electrically operated hydraulic pump systems are commonly used on tailgate loaders and small dump truck hoists. The systems include a switch which, when closed, couples the vehicle battery to the pump driving motor and a hydraulic lowering valve which, when opened, drains the output port of the pump to a reservoir. The control system for this electric pump system comprises an air cylinder operatively connected to the switch and a second cylinder operatively connected to the hydraulic lowering valve. A switching valve is connected between each air cylinder and a source of air pressure. The switching valves may be operated by an operator to pump or drain hydraulic fluid.

REFERENCES:
patent: 2219359 (1940-10-01), Goit et al.
patent: 2517527 (1950-08-01), Moore
patent: 2690712 (1954-10-01), Foote
patent: 4056160 (1977-11-01), Abels et al.
patent: 4881371 (1989-11-01), Haeder et al.

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