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FLUID PRESSURE CIRCUIT

  • US 20090159143A1
  • Filed: 02/20/2007
  • Published: 06/25/2009
  • Est. Priority Date: 07/31/2006
  • Status: Active Grant
First Claim
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1. A fluid pressure circuit comprising:

  • a control valve incorporated with a plurality of first-group spools fed with hydraulic fluid from a first pump and a plurality of second-group spools fed with hydraulic fluid from a second pump, capable of feeding the hydraulic fluid to a specific actuator through a first-group specific spool and a second-group specific spool, capable of feeding the hydraulic fluid to a first actuator through another first-group spool, and capable of feeding the hydraulic fluid to a second actuator through another second-group spool;

    a pilot valve that pilot-operates each spool of the control valve via a pilot line;

    a first detector that detects operation of another first-group spool of the control valve;

    a second detector that detects operation of another second-group spool of the control valve; and

    a solenoid selector valve unit that switches a pilot line of the specific second-group spool from an interrupting state to a communicating state at a time of detection of a spool operation by the first detector and switches a pilot line of the specific first-group spool from an interrupting state to a communicating state at a time of detection of a spool operation by the second detector.

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