发明名称 |
Control valve having integral visual indicator for fluid safety systems |
摘要 |
A control valve structure and combined visual indicator for controlling fluid and visually indicating the operating condition of a portion of a fluid system. The control valve has a slide valve mounted in a housing and biased toward a retracted position with one end portion thereof extending from the housing. The extended end portion of the slide valve has a knob adapted to be manually gripped for moving of the slide valve outwardly for setting same. A visual indicator is mounted on the knob. A port in the housing communicates with the slide valve to permit the application of fluid pressure to the slide valve to move same outwardly. The visual indicator has a visually observable indicator member movable between two positions for indicating the presence of either of two associated conditions in a system containing the control valve. The visual indicator displays one position when less than a predetermined fluid pressure is applied to the visual indicator and it displays the other position when a larger predetermined fluid pressure is applied to the visual indicator.
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申请公布号 |
US4194529(A) |
申请公布日期 |
1980.03.25 |
申请号 |
US19780944456 |
申请日期 |
1978.09.21 |
申请人 |
W K M WELLHEAD SYSTEMS INC |
发明人 |
HARGRAVES, MELVIN J;PETERS, CLIFFORD M |
分类号 |
F16K17/10;F16K37/00;(IPC1-7):F16K37/00 |
主分类号 |
F16K17/10 |
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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