US PATENT SUBCLASS 418 / 200
.~.~ With axially spaced working members

Current as of: June, 1999
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418 /   HD   ROTARY EXPANSIBLE CHAMBER DEVICES

191  DF  INTERENGAGING ROTATING MEMBERS {9}
199  DF  .~ Multiple units {1}
200.~.~ With axially spaced working members

DEFINITION

Classification: 418/200

(under subclass 199) Apparatus including a plurality of sets of interengaging rotating members which are longitudinally spaced and at least one rotating member of each set rotating on a common axis.