Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1975-08-29
1976-09-21
Nilson, Robert G.
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
73298, 137577, 137588, F16K 3700
Patent
active
039813240
ABSTRACT:
A combined service valve and outage indicator for a liquified gas tank, consisting of a valve body engagable in the neck of a liqufied gas container. The valve body has a main screw valve element engagable in a seat in the body to control the flow of gas from the container to a service outlet. The valve element has an operating knob with an indicating pointer overlying a volume scale disc secured on the valve body. Secured to the inlet end of the valve body is a depending cylindrical chamber closed at its bottom end and having spirally arranged holes. A tubular sleeve is rotatably and sealingly engaged in the cylindrical chamber and has a vertical slot or recess registrable progressively with the holes. The top end of the tubular sleeve communicates with a cavity in the chamber leading to a vent passage in the valve body controlled by a screw valve. With the last-named screw valve open, liquid gas will appear at the outer end of the vent passage when the operating knob is turned in an opening direction to a position wherein the tube slot or recess registers with a hole at the level of the liquified gas in the associated chamber, giving an indication on the scale showing said volume of liquified gas remaining in the chamber.
REFERENCES:
patent: 2377343 (1945-06-01), Holicer
patent: 3554224 (1971-01-01), Kirk
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