US PATENT SUBCLASS 415 / 55.1
.~ Turbine regenerative pump

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}
55.1.~ Turbine regenerative pump {2}
55.2  DF  .~.~> Having specific means to deflect working fluid in regenerative passage {2}
55.5  DF  .~.~> Having plural, rigidly related blade sets {2}

DEFINITION

Classification: 415/55.1

Turbine regenerative pump:

(under subclass 52.1) Device comprising a casing* having a ring shaped channel around the runner's axis of rotation within and which the first runner blade row rotates to add energy to working fluid* passing through the channel (i.e., pump*). A (regenerative) portion of the channel lies between a circumferentially spaced working fluid channel inlet and outlet which portion (a) has a significantly greater cross section than does the blade row and (b) is configured to direct the working fluid along a helical path out of and back into contact with the blade row.

(1) Note. The channel is usually perpendicular to and along an arc of constant radius centered upon the runner's axis of rotation.

(2) Note. The working fluid must be directed back into contact with a blade row by design. A device wherein working fluid is incidentally directed back into contact with a blade row (e.g., as in a centrifugal volute pump) is not included in this subclass.

(3) Note. A regenerative turbine pump may also be referred to as a vortex pump, a side channel blower, a ring channel blower, etc.