US PATENT SUBCLASS 92 / 92
.~.~.~ Non-metallic

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

89  DF  COLLAPSIBLE CHAMBER WALL PORTION (E.G., HINGED OR FLEXIBLE WALL) {1}
90  DF  .~ Wall portion formed of flexible material {5}
91  DF  .~.~ Envelope having restricted fluid opening {1}
92.~.~.~ Non-metallic

DEFINITION

Classification: 92/92

(under subclass 91) Apparatus in which the box, bag or bulb member is formed of nonmetallic material.

SEE OR SEARCH CLASS

138, Pipes and Tubular Conduits,

30, for a pressure compensator comprising a flexible bag member, adapted to expand and contract responsive to pressure surges.