Fluid handling – With indicator – register – recorder – alarm or inspection means – Fluid pressure responsive indicator – recorder or alarm
Patent
1978-09-21
1980-03-25
Cline, William R.
Fluid handling
With indicator, register, recorder, alarm or inspection means
Fluid pressure responsive indicator, recorder or alarm
1376242F, 116271, 116272, F16K 3700
Patent
active
041945298
ABSTRACT:
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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Hargraves Melvin J.
Peters Clifford M.
Cline William R.
Riddle Eugene N.
Spiegel H. Jay
W-K-M Wellhead Systems, Inc.
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