US PATENT SUBCLASS 417 / 67
.~.~ Passage in impeller shaft for pumped or motive fluid

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}
67.~.~ Passage in impeller shaft for pumped or motive fluid

DEFINITION

Classification: 417/67

(under subclass 66) Apparatus in which the driven element is provided with a passage passing through the axis of rotation of the element at the point where it is supported for rotation and said passage is described as conveying motive fluid or fluid being pumped.