US PATENT SUBCLASS 418 / 117
.~.~.~ With plural circumferentially spaced peripheral seals

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}
117.~.~.~ With plural circumferentially spaced peripheral seals

DEFINITION

Classification: 418/117

(under subclass 113) Apparatus in which there is provided at least two separate, movable, expandable, adjustable or deformable means on a protruding portion of the working member for engaging the cylinder working chamber surface.