发明名称 |
Method and apparatus for sealing valve stems |
摘要 |
A valve is provided with an improved seal between the valve body and the rotatable valve stem. A high pressure fluid seal is formed by a pressure-responsive lip seal. A spring positioned between the lip seal and the valve stem sealing surface provides a substantially axially directed force to a metal O-ring, which biases the lip seal into sealing engagement with the valve body and stem under relatively low pressure.
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申请公布号 |
US4556196(A) |
申请公布日期 |
1985.12.03 |
申请号 |
US19830563961 |
申请日期 |
1983.12.21 |
申请人 |
GENERAL SCREW PRODUCTS COMPANY |
发明人 |
NIMBERGER, SPENCER M. |
分类号 |
F16J15/32;F16K41/04;(IPC1-7):F16K31/44;F16J15/34 |
主分类号 |
F16J15/32 |
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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