US PATENT SUBCLASS 417 / 68
.~.~ Liquid ring

Current as of: June, 1999
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417 /   HD   PUMPS

65  DF  ONE FLUID PUMPED BY CONTACT OR ENTRAINMENT WITH ANOTHER {10}
66  DF  .~ Contact or entrainment within rotary impeller {4}
68.~.~ Liquid ring {1}
69  DF  .~.~.~> With diverse pump

DEFINITION

Classification: 417/68

(under subclass 66) Apparatus in which the motive fluid is rotated by the driven member at such a speed and in such a manner as to form a peripheral ring around the driven member within a surrounding casing.