Control device for hydrostatic drive, especially for fork lift t

Details Control device for hydrostatic drive, especially for fork lift t Control device for hydrostatic drive, especially for fork lift t

1976-09-09

1977-09-27

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60462, 60484, 60486, F16H 3946, F15B 1116

Patent

active

040502481

ABSTRACT:
A control device for a hydrostatic drive, especially for a fork lift truck, in which an engine drives a reversible variable delivery pump which supplies fluid to a fluid motor connected to the drive wheels of the lift truck. A reversible actuator is connected to a control element for the pump and is connected through a reversing valve with a further engine driven pump. The rate of movement of the actuator is controlled in the opposite directions of movement thereof. The truck includes a lift cylinder supplied by a still further engine driven pump, and when the lift cylinder is under pressure, the rate of movement of the actuator is controlled at a still slower speed of movement in at least one direction of movement.

REFERENCES:
patent: 3543508 (1970-12-01), Schwab
patent: 3850272 (1974-11-01), Reinecke et al.

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