发明名称 |
Valve and coupling assemblies |
摘要 |
A valve assembly for use in for example a stirrup pump. The valve assembly has a body defining a bore into which a carrier is inserted. The carrier defines a tubular passageway with a pair of O-rings spaced apart along the length of that passageway. The passageway is of substantially uniform internal diameter and the O-rings are received in annular grooves formed in the inside surface of the passageway. Two balls are provided each associated with one of the O-rings and an inlet port is provided which communicates with the space in the passageway between the O-rings. The application of an excess pressure to the port drives fluid from the port through one of the O-rings whereas the application of a reduced pressure to the port draws fluid through the other O-ring to the port.
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申请公布号 |
US4622990(A) |
申请公布日期 |
1986.11.18 |
申请号 |
US19850728253 |
申请日期 |
1985.04.29 |
申请人 |
DENIS FERRANTI METERS, LTD. |
发明人 |
NORMAN, GEOFFREY B. |
分类号 |
F04B53/10;F16K15/04;(IPC1-7):F16K43/00;B65B3/32;F04B7/00 |
主分类号 |
F04B53/10 |
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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