US PATENT SUBCLASS 92 / 197
.~.~.~ Adjustable bias (199)

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

172  DF  PISTON {19}
193  DF  .~ With spring means for biasing side wall portion radially {4}
195  DF  .~.~ Open ended hollow skirt comprises biased portion {3}
197.~.~.~ Adjustable bias (199)

DEFINITION

Classification: 92/197

(under subclass 195) Apparatus in which the force exerted by the spring device may be selectively increased or decreased.

SEE OR SEARCH THIS CLASS, SUBCLASS:

199, for a spring means for biasing a side wall portion radially in which the biasing force of the spring is adjustable.