Fluid handling – Control by change of position or inertia of system
Patent
1987-06-04
1989-03-21
Nilson, Robert G.
Fluid handling
Control by change of position or inertia of system
137264, 244135R, F16K 1736
Patent
active
048134457
ABSTRACT:
Apparatus for supplying liquid from a tank (12) to an inlet of a pump (40) without interruption when the condition of the tank changes to a reversed gravity condition, includes a hollow, standpipe body (20) having a first inlet opening (26) and a second inlet opening (28). Internal walls divide the standpipe into a first compartment (32) in communication with the tank through first opening (26), a second compartment (36) which is in communication with a pump inlet port (38) connected to the inlet of pump (40), and a third compartment (42) which is in communication with the tank through second inlet opening (28). Third compartment (42) is also in communication with the discharge of pump (40) through a bleed line (46). The first and second, and second and third compartments are in fluid connection through holes (48) and (50) respectively, in the dividing walls. A vertically moveable spool (52) includes a weighted upper disc (56) and a weighted lower disc (54). The spool includes a connecting stem (58) of sufficient length so that when one disc is adjacent its associated hole blocking fluid flow therethrough, the other disc is disposed from its associated hole enabling fluid flow. In a first gravity condition the stem is disposed downward and fluid flows through first inlet opening (26), first hole (50), second compartment (20), inlet port (38) and into a pump inlet (39). In the first gravity condition, third compartment (42) fills with fluid to the height of second inlet opening (28). Upon gravity reversal, spool (52) moves to open hole (50) and close hole (48) making the accumulated fluid in third compartment (42) immediately available for flow into second compartment (36) and the pump.
REFERENCES:
patent: 1845136 (1932-02-01), Dieter
patent: 2660384 (1953-11-01), Smith
patent: 2933095 (1960-04-01), Rumsey
patent: 2953156 (1960-09-01), Bryant
patent: 3443778 (1969-05-01), Sanz
patent: 4203458 (1980-05-01), Barrett et al.
Jocke Ralph E.
Nilson Robert G.
Parker-Hannifin Corporation
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