US PATENT SUBCLASS 91 / 21
.~.~ Rotating working member or chamber

Current as of: June, 1999
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91 /   HD   MOTORS: EXPANSIBLE CHAMBER TYPE

6  DF  FLUID SUPPLY THROUGH DIVERSE PATHS TO SINGLE EXPANSIBLE CHAMBER {12}
20  DF  .~ Position responsive {4}
21.~.~ Rotating working member or chamber

DEFINITION

Classification: 91/21

(under subclass 20) Apparatus comprising a rotating working member or chamber.

(1) Note. For the definition of rotating working member or chamber see subclass 58.