US PATENT SUBCLASS 418 / 142
.~.~ On working member

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

104  DF  WITH MECHANICAL SEALING {14}
140  DF  .~ Seal element between working member and cylinder {3}
142.~.~ On working member {1}
143  DF  .~.~.~> On working member circumferential periphery

DEFINITION

Classification: 418/142

(under subclass 140) Apparatus wherein the means opposing the passage of fluid is mounted or positioned on the working member.