US PATENT SUBCLASS 416 / 117
.~ Responsive to gravity or working fluid force

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}
117.~ Responsive to gravity or working fluid force {2}
118  DF  .~.~> Having manual control or adjustment
119  DF  .~.~> Motion about parallel axes

DEFINITION

Classification: 416/117

(under subclass 98) Apparatus wherein the working member concurrent movement occurs in response to the force of gravity or the working fluid acting on the working member or apparatus part directly connected thereto.