US PATENT SUBCLASS 415 / 57.2
.~.~ Having additional blade set in re-entry path

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}
57.1  DF  .~ Plural, independent, serially acting re-entry means {3}
57.2.~.~ Having additional blade set in re-entry path

DEFINITION

Classification: 415/57.2

Having additional blade set in reentry path:

(under subclass 57.1) Device comprising a second blade* row which contacts the working fluid* after the first blade or blade row but before one of the reentry means has directed the working fluid back to the first blade or blade row.