US PATENT SUBCLASS 418 / 133
.~.~ Surface abutting working member abuts another coplanar cylinder surface portion

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

104  DF  WITH MECHANICAL SEALING {14}
131  DF  .~ Axially movable end wall or end wall portion {4}
133.~.~ Surface abutting working member abuts another coplanar cylinder surface portion

DEFINITION

Classification: 418/133

(under subclass 131) Apparatus wherein the side of the end wall engaging the working member has a portion abutting an adjacent face or surface portion of the cylinder which is coplanar with the working member face, the cylinder being either fixed or moving.