Fluid handling – With casing – support – protector or static constructional... – Vehicle
Patent
1990-10-09
1993-07-20
Chambers, A. Michael
Fluid handling
With casing, support, protector or static constructional...
Vehicle
137565, 137573, 137587, 251 615, 251 636, 251144, 2513353, A01M 700, E03B 1100
Patent
active
052284735
ABSTRACT:
An internal valve and metered positive displacement pump for a pressure fluid tank. The tank defines a fluid compartment, and first and second vessels are positioned within the protective envelope of the tank. A bellows pump assembly disposed in the first vessel includes a bellows and a piston cylinder arrangement positioned within and attached to the bellows. Pressurized fluid is pumped into and out of the first vessel to actuate the piston cylinder arrangement. With this actuating movement fluid is pumped from the compartment through a valve in the second vessel and into the second vessel for removal therefrom. The valve is normally closed against the working pressure of the fluid in the compartment by a spring bellows relief assembly in the second vessel. The force of the fluid pump by the piston cylinder arrangement opens the valve, and a check valve prevents fluid from flowing back from the valve into the first vessel. A passageway through the first vessel allows the pressurized fluid in the compartment to bear on the bellows and thereby bias the piston cylinder arrangement to an up (or down) position.
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Chambers A. Michael
Montana Sulphur & Chemical Co.
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