Invention Grant
- Patent Title: Control valve for a variable displacement pump
- Patent Title (中): 变排量泵的控制阀
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Application No.: US12406813Application Date: 2009-03-18
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Publication No.: US08647075B2Publication Date: 2014-02-11
- Inventor: Navneet Gulati
- Applicant: Navneet Gulati
- Applicant Address: US OH Cleveland
- Assignee: Eaton Corporation
- Current Assignee: Eaton Corporation
- Current Assignee Address: US OH Cleveland
- Agency: Merchant & Gould P.C.
- Main IPC: F04B1/26
- IPC: F04B1/26

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.
Public/Granted literature
- US20100236399A1 Control Valve for a Variable Displacement Pump Public/Granted day:2010-09-23
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