Invention Grant
- Patent Title: Electro-hydraulic metering valve with integral flow control
- Patent Title (中): 电液计量阀具有整体流量控制
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Application No.: US11192036Application Date: 2005-07-29
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Publication No.: US07240604B2Publication Date: 2007-07-10
- Inventor: David P. Smith , Daniel T. Mather
- Applicant: David P. Smith , Daniel T. Mather
- Applicant Address: US IL Peoria JP
- Assignee: Caterpillar Inc,Shin Caterpillar Mitsubishi Ltd.
- Current Assignee: Caterpillar Inc,Shin Caterpillar Mitsubishi Ltd.
- Current Assignee Address: US IL Peoria JP
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner
- Main IPC: F15B13/04
- IPC: F15B13/04 ; F16K31/12

Abstract:
A metering valve for a work machine hydraulic system is disclosed. The metering valve has a valve body with an inlet and an outlet. The metering valve also has a main poppet disposed within the valve body between the inlet and the outlet. The main poppet has a nose end and a chamber end, and is movable between a flow-passing position at which fluid flows from the inlet to the outlet, and a flow-blocking position at which fluid flow between the inlet and outlet is blocked. The metering valve also has a pilot element movable to selectively communicate the chamber end of the main poppet with a drain, thereby affecting movement of the main poppet between the flow-passing and flow-blocking positions. The metering valve further has a solenoid mechanism operable to move the pilot element. The position of the pilot element is affected by a fluid pressure at the inlet.
Public/Granted literature
- US20070022871A1 Electro-hydraulic metering valve with integral flow control Public/Granted day:2007-02-01
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