Fluid handling – Diverse fluid containing pressure systems – Fluid separating traps or vents
Patent
1978-05-05
1980-03-18
Cohan, Alan
Fluid handling
Diverse fluid containing pressure systems
Fluid separating traps or vents
137206, 137433, 137423, F04F 106
Patent
active
041934172
ABSTRACT:
A fluid check valve device for use with a gas precharged fluid storage tank comprising a valve body including a float chamber having an upper and lower check valve assembly formed at opposite ends thereof wherein the lower check valve assembly comprises a lower float member movable between a sealed and unsealed position and a lower valve seat and the upper check valve assembly comprises an upper float member movable between a sealed and unsealed position with a first and second upper valve seat together with antivortex flow apertures formed in the lower portion of the lower float chamber immediately above the lower valve seat and a plurality of float control apertures formed on the mid-portion of the float chamber such that as the gas precharged fluid storage tank is filled with fluid the lower float member is unseated from the lower valve seat permitting the gas precharged fluid storage tank and lower float chamber to be filled through the antivortex flow apertures and wherein the upper float member is moved from the first valve seat as the fluid approaches the top of the valve body to exhaust the gas from the fluid check valve device and seats with the second upper valve seat when the fluid reaches the top of the valve body and wherein as fluid is drawn from the gas precharged fluid storage tank through the antivortex flow apertures and the fluid level within the gas precharged fluid storage tank reaches the level of the upper check valve assembly the upper float member is again sealed with the first upper valve seat to prevent air from entering into the fluid check valve device and as the water level within the precharged fluid storage tank reaches the float control apertures air flows into the float chamber causing the lower float member to move downward until seated or sealed on the lower valve seat to prevent the precharged gas from escaping.
REFERENCES:
patent: 2685298 (1954-08-01), Clearman
patent: 2972412 (1961-02-01), Lundeen
patent: 4051030 (1977-09-01), Huiet
Bowman George F.
Prescher Kenneth A.
Cohan Alan
Fisher, III Arthur W.
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