US PATENT SUBCLASS 416 / 115
.~.~.~.~ Plural impellers

Current as of: June, 1999
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416 /   HD   FLUID REACTION SURFACES (I.E., IMPELLERS)

98  DF  SUSTAINED ANCILLARY MOVEMENT OF ROTARY WORKING MEMBER (E.G., CYCLIC FEATHERING, ETC.) {9}
112  DF  .~ Responsive to fixed actuator (e.g., cam or trip, etc.) {2}
113  DF  .~.~ Axial cam {1}
114  DF  .~.~.~ Selectively adjustable {1}
115.~.~.~.~ Plural impellers

DEFINITION

Classification: 416/115

(under subclass 114) Apparatus in which the concurrent movements of a plurality of impellers are varied at will.