Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1996-07-25
1998-04-28
Lopez, F. Daniel
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
60452, F16D 3102
Patent
active
057430896
ABSTRACT:
A control valve is provided in a line between a variable displacement hydraulic pump and a hydraulic cylinder. The control valve controls flow rate of working fluid supplied to the hydraulic cylinder according to a manipulated variable of a lever. The control increases a discharge of the hydraulic pump in association with the increase in the manipulated variable and also controls to suppress the discharge as the discharge pressure of the hydraulic pump increases. A proper response corresponding to the operator's feeling can be realized in consideration of an actual pressure loaded on an actuator on the basis of a positive control system.
REFERENCES:
patent: 4976106 (1990-12-01), Noerskau et al.
patent: 5394697 (1995-03-01), Hirata
patent: 5398507 (1995-03-01), Akiyama et al.
patent: 5533867 (1996-07-01), Strenzke
Kabushiki Kaisha Kobe Seiko Sho
Lopez F. Daniel
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