US PATENT SUBCLASS 418 / 206.8
.~.~.~ With lubrication

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

191  DF  INTERENGAGING ROTATING MEMBERS {9}
205  DF  .~ Like rotary members {1}
206.1  DF  .~.~ Having each radial protuberance of like dimension {8}
206.8.~.~.~ With lubrication

DEFINITION

Classification: 418/206.8

With lubrication:

(under subclass 206.1) Apparatus comprising a means for supplying a substance between moving parts that reduces friction.