US PATENT SUBCLASS 418 / 11
.~ Sliding abutment


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

5  DF  MULTISTAGE {7}
11.~ Sliding abutment


DEFINITION

Classification: 418/11

(under subclass 5) Apparatus in which at least one of the working chambers includes an abutment member having an end surface normally maintained in sealing engagement with the working member peripheral surface and having side portions slidably received in the cylinder to have sliding movement therein incident to the expansion and contraction of the working member.