US PATENT SUBCLASS 297 / 292
.~ Coil spring surrounds horizontal pivot

Current as of: June, 1999
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297 /   HD   CHAIRS AND SEATS

285  DF  BACK MOVEMENT RESILIENTLY OPPOSED IN OPERATING POSITION {12}
292.~ Coil spring surrounds horizontal pivot

DEFINITION

Classification: 297/292

(under subclass 285) Device where the coil spring encompasses a pivot shaft or rod.

SEE OR SEARCH CLASS

248, Supports,

597, for a support surface biased about a stationary, horizontal axis by a rigid spring which surrounds the axis.