US PATENT SUBCLASS 92 / 251
.~.~.~.~ Wall portion comprises plural axially aligned flexible elements

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

172  DF  PISTON {19}
248  DF  .~ Nonmetallic portion {1}
249  DF  .~.~ Flexible {3}
250  DF  .~.~.~ Flexible side wall portion between separable axially spaced rigid members {1}
251.~.~.~.~ Wall portion comprises plural axially aligned flexible elements {1}
252  DF  .~.~.~.~.~> Three or more elements

DEFINITION

Classification: 92/251

(under subclass 250) Apparatus in which the flexible nonmetallic portion comprises two or more separate independent elements extending in axially aligned relation.