Invention Application
US20100236399A1 Control Valve for a Variable Displacement Pump 失效
可变排量泵的控制阀

  • Patent Title: Control Valve for a Variable Displacement Pump
  • Patent Title (中): 可变排量泵的控制阀
  • Application No.: US12406813
    Application Date: 2009-03-18
  • Publication No.: US20100236399A1
    Publication Date: 2010-09-23
  • Inventor: Navneet Gulati
  • Applicant: Navneet Gulati
  • Main IPC: F01B3/10
  • IPC: F01B3/10 F04B1/29
Control Valve for a Variable Displacement Pump
Abstract:
A fluid device includes a variable swashplate adapted for movement between a first position and a second position. A control piston is adapted to selectively move the variable swashplate between the first and second positions. A control valve is in fluid communication with the control piston. The control valve includes a sleeve defining a spool bore, at least one fluid inlet passage in fluid communication with a fluid source and at least one control passage in fluid communication with the control piston. The control fluid passage includes an opening at the spool bore. A spool is disposed in the spool bore of the sleeve. The spool includes a metering surface that selectively communicates fluid between the fluid inlet passage and the control fluid passage. The metering surface has a first end and a second end. The metering surface having a tapered surface disposed between the first and second ends.
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