US PATENT SUBCLASS 418 / 148
.~.~.~ Positively urged to engage cylinder

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

104  DF  WITH MECHANICAL SEALING {14}
145  DF  .~ Seal element between vane and cylinder {2}
147  DF  .~.~ Movable seal on vane {1}
148.~.~.~ Positively urged to engage cylinder

DEFINITION

Classification: 418/148

(under subclass 147) Apparatus in which the means opposing the passage of fluid is movable and is biased into engagement or maintained in engagement with the cylinder surface by means other than an inherent property of the opposing means.

(1) Note. For example, gravity, centrifugal force, and elasticity are deemed to be inherent properties of a sealing

element.