US PATENT SUBCLASS 92 / 242
.~.~ Plural axially spaced lips

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}
242.~.~ Plural axially spaced lips {1}
243  DF  .~.~.~> Oppositely facing {1}

DEFINITION

Classification: 92/242

(under subclass 240) Apparatus comprising a plurality of peripheral axially extending flexible lips, said lips being spaced one from the other in a direction extending along the piston axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:

192, for a piston having a plurality of integrally formed radially extending resilient metallic sealing tongues on the side wall portion thereof.