US PATENT SUBCLASS 418 / 140
.~ Seal element between working member and cylinder

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

104  DF  WITH MECHANICAL SEALING {14}
140.~ Seal element between working member and cylinder {3}
141  DF  .~.~> Labyrinth
142  DF  .~.~> On working member {1}
144  DF  .~.~> Between adjacent cylinder and working member sides

DEFINITION

Classification: 418/140

(under subclass 104) Apparatus provided with a means mounted on either the cylinder or the working member but either engaging the other or having slight clearance with the other to oppose the passage of fluid therepast.