发明名称 |
Fluid pressure biased fluid valve device |
摘要 |
A fluid valve device for on-off control of fluid flow through a passage extending between two fluid ports (12, 15) and including a valve seat (17A) comprises a hollow valve member (21) which is movable into and out of sealing engagement with the valve seat and defines a valve chamber (20). The valve chamber (20) communicates with one of the fluid ports (15) through the valve seat (17A) and is associated with a valve member actuating device (A) which translates the pressure of the fluid received in the valve chamber (20) from an inlet (12/14) for the fluid flow into a force acting on the valve member to displace it relative to the valve seat (17A). The valve member actuating device in one embodiment includes a thrust surface (A) on the valve member (21) which is directed away from the valve seat and forms part of the wall of the valve chamber (20). A second thrust surface (C) on the valve member (21) is directed oppositely and defines a chamber (V) which is isolated from the valve chamber and the flow passage. A positive-displacement pump includes the fluid valve device as an inlet valve for controlling the admission into the pump chamber (20) of the fluid being pumped.
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申请公布号 |
US5562122(A) |
申请公布日期 |
1996.10.08 |
申请号 |
US19960582869 |
申请日期 |
1996.01.04 |
申请人 |
HUMANTEKNIK A.B. |
发明人 |
LUNDB+E,UML A+EE CK, STIG |
分类号 |
F04B43/02;(IPC1-7):F16K31/12 |
主分类号 |
F04B43/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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