Title:
一体的流量制御を有する電気油圧式絞り弁
Document Type and Number:
Japanese Patent JP5061107
Kind Code:
B2
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.
Inventors:
David P. Smith
Daniel Tea. Mother
Daniel Tea. Mother
Application Number:
JP2008523948A
Publication Date:
October 31, 2012
Filing Date:
July 18, 2006
Export Citation:
Assignee:
CATERPILLAR INCORPORATED
International Classes:
F16K31/06; E02F9/22; F16K31/40
Domestic Patent References:
| JP2004068955A | ||||
| JP2001315177A | ||||
| JP63020584U |
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Naozumi Ono
Sachiko Okunuki
Kazuo Abe
Naozumi Ono
Sachiko Okunuki