Fluid pressure control system for hydraulic excavators

Details Fluid pressure control system for hydraulic excavators Fluid pressure control system for hydraulic excavators

1995-09-06

1997-07-01

Nguyen, Hoang

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

60452, F16D 3102

Patent

active

056426160

ABSTRACT:
A fluid pressure control system for hydraulic excavators includes a load sensing valve in communication with first and second pressure compensator valves via a load sensing line and responsive to a load sensing pressure developed in the load sensing line for regulating the discharge volume of a working fluid and a swing torque regulator lying midway of the load sensing line between the load sensing valve and the first pressure compensator valve to selectively allow and inhibit a fluid communication between the first pressure compensator valve and the load sensing valve depending on the pressure of a pilot fluid.

REFERENCES:
patent: 4938023 (1990-07-01), Yoshino
patent: 5209063 (1993-05-01), Shirai et al.
patent: 5347811 (1994-09-01), Hasegawa et al.
patent: 5460000 (1995-10-01), Kropp

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