US PATENT SUBCLASS 267 / 175
.~.~.~ Adjustable

Current as of: June, 1999
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267 /   HD   SPRING DEVICES

166  DF  COIL {6}
170  DF  .~ Including end thrust member {7}
174  DF  .~.~ For dynamic or work environment {2}
175.~.~.~ Adjustable

DEFINITION

Classification: 267/175

(under subclass 174) Spring device, including means for selectively varying the spring force of the spring element whereby the character of movement of the member may correspondingly be selectively varied.