US PATENT SUBCLASS 91 / 174
.~ With connection to relatively movable output member disposed between spaced unitary end faces

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}
174.~ With connection to relatively movable output member disposed between spaced unitary end faces

DEFINITION

Classification: 91/174

(under subclass 170) Apparatus in which at least one of the working members has spaced integral opposed working faces or an additional working member rigidly secured thereto, and engaging a relatively movable load or transmission member at a point between the opposed faces or at a point between the rigidly connected working members.

SEE OR SEARCH THIS CLASS, SUBCLASS:

493, for motors having three or more radially arranged cylinders and having at least one pair of rigidly connected pistons reciprocating in rigidly connected cylinders, there being provided a transmission or reaction element interposed between said rigid pistons.