US PATENT SUBCLASS 418 / 12
.~ Swinging abutment


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

5  DF  MULTISTAGE {7}
12.~ Swinging abutment


DEFINITION

Classification: 418/12

(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 is swingably mounted to the cylinder to have swinging movement therewith incident to the expansion and contraction of the working member.