US PATENT SUBCLASS 418 / 190
.~ With tooth modification

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

189  DF  TRAPPED FLUID RELIEF {1}
190.~ With tooth modification

DEFINITION

Classification: 418/190

(under subclass 189) Apparatus wherein at least one of the rotating members has peripheral lobed portions altered to allow for the escape of fluid when in meshing relationship with the other rotating member.