US PATENT SUBCLASS 91 / 194
.~.~.~ Rotating output shaft type (e.g., locomotive or reversing means)

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

170 R  DF  RELATIVELY MOVABLE WORKING MEMBERS WITH ONE HAVING MOTIVE FLUID CONTROLLED BY, MOVABLY INTERCONNECTED WITH OR MOVED BY ANOTHER {12}
189 R  DF  .~ Position of one working member controls motive fluid for another {3}
191  DF  .~.~ Each cyclically controls another (e.g., duplex) {4}
194.~.~.~ Rotating output shaft type (e.g., locomotive or reversing means)

DEFINITION

Classification: 91/194

(under subclass 191) Apparatus having a disclosure of a means to convert the motion of the working members to a rotary output.

(1) Note. The patents in this subclass disclose, but do not claim transmission features (e.g. the wheels, crankpins and axle of a locomotive) which, if claimed, would cause the patent to be classified in subclasses 183+ but the valving is peculiar to a rotary output and yet is often not associated with the transmission.