US PATENT SUBCLASS 297 / 289
.~.~ Rearward back tilting axially compresses spring

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

285  DF  BACK MOVEMENT RESILIENTLY OPPOSED IN OPERATING POSITION {12}
286  DF  .~ Resilient support includes armrest {3}
289.~.~ Rearward back tilting axially compresses spring

DEFINITION

Classification: 297/289

(under subclass 286) Device wherein the spring means comprises a sliding piece moved by or against an elastic means, e.g., coil, within a vessel or about a rod.