.~ Fluid pressure responsive axial movement of end face portion radially moves side wall portion
DEFINITION
Classification: 92/247
(under subclass 172) Apparatus in which the piston comprises a pair of spaced relatively axially movable rigid members one of which comprises the end face portion, and a radially movable element forming a side wall portion of the piston interposed between said members so that axial movement of said end face portion relative to said other rigid member responsive to the pressure of working fluid acting on said end face portion causes radial movement of said element.
SEE OR SEARCH THIS CLASS, SUBCLASS:
205+, for a piston provided with a side wall portion positioned between a pair of axially spaced relatively movable rigid members, and in which the axially spaced members may be moved and held to different positions toward or away from each other to effect radial adjustment of the side wall portion.
