Hydraulic actuator operation controller

Details Hydraulic actuator operation controller Hydraulic actuator operation controller

1997-03-26

1998-11-24

Nguyen, Hoang

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60459, F16D 3102

Patent

active

058392793

ABSTRACT:
A hydraulic actuator operation controller is shown to make it possible to easily change the operation speeds of a hydraulic actuator for a control input of an operating instrument. A signal input from a control input detection device for detecting the control input of an operating lever is converted according to a logical function by a signal conversion unit. The signal conversion unit increases or decreases the signal in magnitude and outputs the converted signal to a pump control device. The pump control device outputs an instruction to a capacity change device such as an electromagnetic proportional control valve connected to a hydraulic pump. The converted signal is also provided to a valve control device for outputting an instruction to a valve opening-degree control device such as electromagnetic proportional control valves connected to a control valve.

REFERENCES:
patent: 4823552 (1989-04-01), Ezell et al.
patent: 4884402 (1989-12-01), Strenzke et al.
patent: 5182908 (1993-02-01), Devier et al.
patent: 5249421 (1993-10-01), Lunzman
patent: 5452579 (1995-09-01), Freidrichsen
patent: 5493861 (1996-02-01), Freidrichsen
patent: 5537819 (1996-07-01), Kobayashi
Patent Abstract of Japan, Publication No. 02125032A, May 1990.

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