US PATENT SUBCLASS 91 / 177
.~ Oscillating working members

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}
177.~ Oscillating working members

DEFINITION

Classification: 91/177

(under subclass 170) Apparatus in which at least two relatively movable working members move back and forth about one or more axes to describe arcs of not more than 360 degrees.

SEE OR SEARCH CLASS

73, Measuring and Testing,

252, for meters having oscillating pistons.

92, Expansible Chamber Devices,

67, for expansible chamber devices having plural oscillating working members.