US PATENT SUBCLASS 297 / 301.1
.~ Back adjusts independent of seat

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

285  DF  BACK MOVEMENT RESILIENTLY OPPOSED IN OPERATING POSITION {12}
301.1.~ Back adjusts independent of seat {4}
301.2  DF  .~.~> Fluid-spring
301.3  DF  .~.~> Torsion bar or torsion spring
301.4  DF  .~.~> Coil spring
301.5  DF  .~.~> Including back movement limiting device {1}

DEFINITION

Classification: 297/301.1

Back adjust independent of seat:

(under subclass 285) Opposed back movement wherein the elastic member opposes movement of the upright support independent of the bottom.

(1) Note. This subclass contains chairs wherein the bottom support is fixed or moves independent of the upright support movement.