US PATENT SUBCLASS 92 / 249
.~.~ Flexible

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

172  DF  PISTON {19}
248  DF  .~ Nonmetallic portion {1}
249.~.~ Flexible {3}
250  DF  .~.~.~> Flexible side wall portion between separable axially spaced rigid members {1}
253  DF  .~.~.~> Axially spaced flexible side wall forming elements with interposed rigid spacer member
254  DF  .~.~.~> With imbedded reinforcing means (241)

DEFINITION

Classification: 92/249

(under subclass 248) Apparatus in which the nonmetallic material is of a type which is pliable.

SEE OR SEARCH THIS CLASS, SUBCLASS:

125, for an oscillating vane type piston provided with a nonmetallic peripheral sealing portion.