Pumps – With condition responsive pumped fluid control – Fluid flow rate responsive
Patent
1991-03-11
1992-11-10
Bertsch, Richard A.
Pumps
With condition responsive pumped fluid control
Fluid flow rate responsive
417310, F04B 4900
Patent
active
051619598
ABSTRACT:
The flow control system includes a flow control valve, an orifice located between the pump outlet port, a passage carrying feedback pressure at a location downstream from the orifice to one side of the valve, and a bypass port located between the pump outlet and the pump inlet. The bypass port opens as a valve spool moves due to differential pressure across the orifice. When pump discharge is low, the valve closes the bypass port; when pump flow rate increases, the valve opens the bypass port. The jet pump effect of a bypass diffuser, located between the bypass port and the pump inlet, supercharges low pressure fluid in a remote reservoir by using kinetic energy in the bypass flow to draw fluid from the reservoir into the pump and to raise static pressure at the pump inlet. A clip having a relatively large wetted surface area in comparison to its cross sectional area is located in a passage connecting the pump outlet and the load.
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Basichas Alfred
Bertsch Richard A.
Coppiellie Raymond L.
Ford Motor Company
May Roger L.
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