US PATENT SUBCLASS 418 / 10
.~.~ Three or more

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

5  DF  MULTISTAGE {7}
9  DF  .~ Interengaging rotary members {1}
10.~.~ Three or more

DEFINITION

Classification: 418/10

(under subclass 9) Apparatus having three or more rotating members at least one of which has a peripheral surface engaging the peripheral surfaces of two or more other rotating members.