US PATENT SUBCLASS 415 / 56.1
.~ Pump priming means

Current as of: June, 1999
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415 /   HD   ROTARY KINETIC FLUID MOTORS OR PUMPS

52.1  DF  WITH MEANS FOR RE-ENTRY OF WORKING FLUID TO BLADE SET (E.G., RE-ENTRY TYPE DEVICE, PASSAGE, ETC.) {11}
56.1.~ Pump priming means {5}
56.2  DF  .~.~> Vertical runner shaft
56.3  DF  .~.~> Having plural and arcuately arranged vanes around runner
56.4  DF  .~.~> Re-entry through working fluid discharge passage for runner
56.5  DF  .~.~> Re-entry working fluid joins inlet working fluid upstream of runner
56.6  DF  .~.~> Walled pumping chamber positioned within liquid separation chamber

DEFINITION

Classification: 415/56.1

Pump priming means:

(under subclass 52.1) Device comprising means for directing a portion of liquid working fluid* to the first runner* blade* or row of blades, which liquid portion has previously been acted upon by the blade or row of blades (i.e., pump* devices). The means acts to displace gaseous fluid (e.g., air, etc.,) in the device replacing it with liquid working fluid (e.g., water, etc.).

(1) Note. The means usually functions exclusively during the startup of the device in order to facilitate reaching steady state operation.