Fluid pressure circuit

Details Fluid pressure circuit Fluid pressure circuit

2011-06-14

2011-06-14

Schneider, Craig (Department: 3753)

Fluid handling

Systems

Supply and exhaust

C060S422000, C091S515000, C091S530000

Reexamination Certificate

active

07958907

ABSTRACT:
A fluid pressure circuit that can, in either case where a first actuator that is fed from a first pump or a second actuator that is fed from a second pump is operated, by allowing feeding of the hydraulic fluid to a specific actuator from either the first or second pump, improve interlockability with the specific actuator. A control valve is incorporated with a plurality of first-group spools fed from a drive pump and a plurality of second-group spools fed from an idle pump. A solenoid selector valve unit switches a pilot line of a second-group tool controlling spool to a communicating state at the time of detection of a spool operation by a first pressure switch and switches a pilot line of a first-group tool controlling spool to a communicating state at the time of detection of a spool operation by a second pressure switch.

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patent: 2004-245262 (2004-09-01), None

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