Invention Grant
- Patent Title: Dampened hydraulic pilot control arrangement for a spool valve
- Patent Title (中): 用于滑阀的减震液压先导控制装置
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Application No.: US13503412Application Date: 2009-10-26
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Publication No.: US08925584B2Publication Date: 2015-01-06
- Inventor: Christian Balmonet , David Lazzaro
- Applicant: Christian Balmonet , David Lazzaro
- Applicant Address: FR St. Priest
- Assignee: Renault Trucks
- Current Assignee: Renault Trucks
- Current Assignee Address: FR St. Priest
- Agency: WRB-IP LLP
- International Application: PCT/IB2009/007563 WO 20091026
- International Announcement: WO2011/051752 WO 20110505
- Main IPC: F15B13/04
- IPC: F15B13/04 ; F15B13/042 ; F15B13/043

Abstract:
A hydraulic pilot control arrangement for a spool valve is provided, wherein the spool of the spool valve is biased towards a central position. The arrangement includes a first and a second pilot hydraulic line connected to opposite sides of the spool of the spool valve and a pilot pressure regulating arrangement is provided for selectively establishing or removing a pilot pressure in each of the first and second lines. The arrangement includes a damping device including a chamber divided into a first and a second pressure compartment by a sliding piston, the first and second pressure compartments being connected respectively to the first and second pilot hydraulic lines, and the piston is biased towards a rest position in the chamber.
Public/Granted literature
- US20120205565A1 DAMPENED HYDRAULIC PILOT CONTROL ARRANGEMENT FOR A SPOOL VALVE Public/Granted day:2012-08-16
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