Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1995-07-11
1997-05-06
Nguyen, Hoang
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
60452, F16D 3102
Patent
active
056260156
ABSTRACT:
A delivery control device for hydraulic pumps suitable for controlling the pump delivery such that the pump's delivery characteristics are not influenced by load acting on actuators is disclosed. The device also reduces the pump delivery in cases where no actuator is being operated but instantly increases the pump delivery in the event either actuator is operated. The device has a branch line branched from a pilot line and adapted for draining the swash plate's regulating pilot oil from the pilot line to a return tank, and a relief valve provided in the branch line, selectively opened in response to a preset pressure applied thereto. The preset pressure for opening the relief valve is the delivery pressure of the hydraulic pump.
REFERENCES:
patent: 4420937 (1983-12-01), Naruse et al.
patent: 4468173 (1984-08-01), Dantlgraber
patent: 5101628 (1992-04-01), Yoshino
patent: 5277027 (1994-01-01), Aoyagi et al.
Nguyen Hoang
Samsung Heavy Industries Co. Ltd.
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