US PATENT SUBCLASS 417 / 80
.~.~.~ Rotary nonexpansible chamber-type generating pump

Current as of: June, 1999
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417 /   HD   PUMPS

65  DF  ONE FLUID PUMPED BY CONTACT OR ENTRAINMENT WITH ANOTHER {10}
76  DF  .~ Jet pump with motive fluid generating pump {4}
79  DF  .~.~ Jet delivers back to generating pump {1}
80.~.~.~ Rotary nonexpansible chamber-type generating pump {3}
81  DF  .~.~.~.~> Multiple-stage rotary pump
82  DF  .~.~.~.~> Changeable jet location (e.g., deep or shallow well)
83  DF  .~.~.~.~> Jet within rotary pump casing

DEFINITION

Classification: 417/80

(under subclass 79) Apparatus in which the motive fluid generating pump comprises a pumping member which has unidirectional rotary motion about a fixed axis and acts to pump fluid by a centrifugal, centripetal or screw effect.