Arrangement for influencing the operating quantity of a servo-mo

Details Arrangement for influencing the operating quantity of a servo-mo Arrangement for influencing the operating quantity of a servo-mo

1978-03-03

1980-05-27

Cohen, Irwin C.

Motors: expansible chamber type

With motive fluid valve

Relatively movable serial valves

91448, 13759612, F15B 1108, F15B 13042

Patent

active

042044600

ABSTRACT:
The invention relates to a fluid pressure supply system for controlling a servomotor and in particular the forward speed of the servomotor, such as the raising speed of a fork lift truck, independently of the actual loading on the servomotor. This is accomplished with the combination of a pressure responsive regulating and reducing valve and a throttle valve in the supply branch of the circuit. The pressure regulating and reducing valves have setting elements that are loaded in opening directions by desired value springs and by a pilot pressure tapped between the reducing valve and the throttle valve.

REFERENCES:
patent: 3067725 (1962-12-01), Hemstreet et al.
patent: 3559534 (1971-02-01), Munro
patent: 3566749 (1971-03-01), Allen et al.

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