CONTROL VALVE DEVICE
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Sep 27, 2012
app pub date -
Oct 29, 2010
filing date -
Nov 9, 2009
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A control valve device develops opening/closing accuracy of a valve assembly. The valve head 310a is configured to open and close a transfer path formed in the valve housing 305 by transmitting the power to the valve assembly 310 from the power transmission member according to a pressure ratio between working fluid supplied to the first space Us and the second space Ls, respectively. The valve head has a Vickers hardness larger than a Vickers hardness of a valve seat of the transfer path to be in contact with the valve head, and a hardness difference therebetween is set to be about 200 Hv to about 300 Hv.
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