US PATENT SUBCLASS 92 / 201
.~ Radially adjustable side wall portion

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

172  DF  PISTON {19}
201.~ Radially adjustable side wall portion {4}
202  DF  .~.~> Adjustable portion comprises open-ended hollow skirt {1}
204  DF  .~.~> Adjustment effected by selectively removable spacer or skim element between relatively movable parts
205  DF  .~.~> Side wall portion positioned between relatively axially adjustable rigid end members {1}
207  DF  .~.~> Adjustment effected by wedge member movable relative to side wall portion (203)

DEFINITION

Classification: 92/201

(under subclass 172) Apparatus in which means are provided to move and hold a side wall portion of the piston to different positions laterally of the piston axis to vary the peripheral extent of the piston.

SEE OR SEARCH THIS CLASS, SUBCLASS:

115, for a piston having a radially adjustable side wall portion, and provided with means for moving said side wall portion, said means including an actuator extending through an axially extending hollow rod on the piston.

193+, for a spring means for biasing a side wall portion radially.