US PATENT SUBCLASS 91 / 152
MULTIPLE EXPANSION

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

152MULTIPLE EXPANSION {7}
153  DF  .~> Duplex {1}
155  DF  .~> With fluid actuated distributor
156  DF  .~> Concentric working chambers
157  DF  .~> Relative valving adjustment between high and low pressure working chambers {1}
159  DF  .~> Expansion between relatively movable working members {2}
163  DF  .~> Fluid expanded through working member
164  DF  .~> Dual, rigidly connected high and low pressure faces

DEFINITION

Classification: 91/152

(under the class definition) Apparatus utilizing an expansible motive fluid and having a plurality of working chambers at least one of which receives its motive fluid in whole or in part from another of the working chambers for expansion or further expansion of the motive fluid therein to perform work.

(1) Note. This definition does not include motors in which motive fluid is supplied to a first expansible chamber and then directed to a second expansible chamber while the first is still in communication with the supply so as to in effect provide direct communication between the second chamber and the supply.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8+, for multiple expansion motors having means for simultaneously supplying live motive fluid to a subsequent chamber while the prior chamber is exhausting to the subsequent chamber.

62+, for multiple expansion motors wherein one of the working chambers includes a rotary working member.

SEE OR SEARCH CLASS

417, Pumps, 244+, for pumps having successive pumping stages.