Hydraulic motor control system

Details Hydraulic motor control system Hydraulic motor control system

1997-11-17

1999-08-24

Richter, Sheldon J.

Motors: expansible chamber type

Independently operated timer, delay, pattern or cyclic control

Fluid actuated valve with volume chamber delay means

91 35, 60468, F15B 1104

Patent

active

059411554

ABSTRACT:
A flow control valve is disposed in a bleed-off line which is for returning to a tank a portion of an oil flow advancing toward a hydraulic motor from a hydraulic pump. Upon operation of a control valve in an accelerating direction, the flow control valve is operated in a closing direction with a certain time lag, while upon operation of the control valve in a decelerating direction, the flow control valve is operated in an opening direction without a time lag. By so doing, an accelerating operation can be done smoothly while maintaining a required torque.

REFERENCES:
patent: 4481770 (1984-11-01), Lohbauer et al.
patent: 4694649 (1987-09-01), Howeth
patent: 5025626 (1991-06-01), Crosser et al.
patent: 5050483 (1991-09-01), Yoshikawa et al.
patent: 5680760 (1997-10-01), Lunzman
Patent Abstracts of Japan, vol. 014, No. 424, Sep. 12, 1990, JP 02 168002 (Jun. 28, 1990).

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