US PATENT SUBCLASS 92 / 252
.~.~.~.~.~ Three or more 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  DF  .~.~.~.~ Wall portion comprises plural axially aligned flexible elements {1}
252.~.~.~.~.~ Three or more elements

DEFINITION

Classification: 92/252

(under subclass 251) Apparatus in which the pliable nonmetallic portion comprises three or more separate independent axially aligned pliable nonmetallic elements.