Fluid handling – Processes
Patent
1998-11-23
1999-10-26
Michalsky, Gerald A.
Fluid handling
Processes
119250, 137128, 137147, 417 65, F04F 1000
Patent
active
059709995
ABSTRACT:
The hydraulic vacuum pump (HVP) uses a centrifugal water pump with unconventional inlet and outlet connections that cause unconventional patterns of fluid flow. Valves are not required for operation. The submerged pump outlet must be kept open and unobstructed to flow, and must also be no smaller in cross-sectional area than the submerged pump-inlets. The pump inlet branches into two openings, each for a distinctly different purpose. A submerged pump-priming inlet branch uses an orifice of predetermined size to assure minimum liquid flow while also controlling both rate and limit of air extraction. The other inlet opening is connected to a fixed priming-siphon from which air is extracted as it is mixed with liquid in the pump in a novel automatic, pressure-activated cyclic action, and freely expelled in the outflow. The crown of the priming-siphon is equipped with an air inlet that may be connected by leakproof channels to the crowns of one or more other siphons that have the same or lesser elevations for priming, or to other enclosed spaces from which air that may be mixed with liquid is to be extracted at subatmospheric pressure.
REFERENCES:
patent: 4951699 (1990-08-01), Lipman
Greenia Maurice J.
Michalsky Gerald A.
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