US PATENT SUBCLASS 418 / 116
.~.~.~ Ring seal or arcuate seal portion

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

104  DF  WITH MECHANICAL SEALING {14}
112  DF  .~ Seal on working member periphery separates inlet and outlet ports {1}
113  DF  .~.~ Seal on working member peripheral projection engages cylinder working chamber surface (e.g., apex seals) {9}
116.~.~.~ Ring seal or arcuate seal portion

DEFINITION

Classification: 418/116

(under subclass 113) Apparatus in which the movable, expandable, adjustable or deformable means is at least in part, in the form of a circular band or loop and lies in a plane generally normal to the direction of working member rotation.