US PATENT SUBCLASS 92 / 245
.~.~ Lip forms peripheral portion of imperforate cup shaped element


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

172  DF  PISTON {19}
240  DF  .~ Side wall portion includes peripheral axially extending flexible lip {4}
245.~.~ Lip forms peripheral portion of imperforate cup shaped element


DEFINITION

Classification: 92/245

(under subclass 240) Apparatus comprising a cup-shaped element formed of flexible material having an imperforate planar portion forming the bottom of the cup and in which the peripheral lip forms the side wall of the cup.