US PATENT SUBCLASS 92 / 95
.~.~.~ Adjustable

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}
94  DF  .~.~ With separate biasing means {1}
95.~.~.~ Adjustable

DEFINITION

Classification: 92/95

(under subclass 94) Apparatus in which the force exerted by the means may be selectively increased or decreased so that the force exerted on the flexible wall portion by the means can be varied.

SEE OR SEARCH THIS CLASS, SUBCLASS:

133, for an adjustable separate biasing means for a working member.