Hydraulic circuit system for hydraulic working machine

Details Hydraulic circuit system for hydraulic working machine Hydraulic circuit system for hydraulic working machine

1998-09-01

1999-08-24

Novosad, Christopher J.

Excavating

Scoop or excavating and transporting container

37466, E02F 922

Patent

active

059409975

ABSTRACT:
A hydraulic circuit system includes a shuttle block, and shuttle valves are arranged and connected within the shuttle block. The maximum pressure in a predetermined operation signal pressure group selected from operation signal pressures generated by pilot operating units is selected to produce a control signal pressure within the shuttle block. The control signal pressure is output to control devices such as a track communicating valve, a swing brake cylinder, and regulators for hydraulic pumps.

REFERENCES:
patent: 3631615 (1972-01-01), Reinsma
patent: 4506464 (1985-03-01), Cartner
patent: 4999935 (1991-03-01), Simi et al.
patent: 5210964 (1993-05-01), Lam et al.
patent: 5265356 (1993-11-01), Winter
patent: 5361519 (1994-11-01), Ciula et al.

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