US PATENT SUBCLASS 297 / 210
.~.~.~ Serially arranged tension and compression springs

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

195.1  DF  STRADDLE SEAT (E.G., SADDLE TYPE, ETC.) {16}
208  DF  .~ Coil spring-mounted {2}
209  DF  .~.~ Vertically oriented {3}
210.~.~.~ Serially arranged tension and compression springs

DEFINITION

Classification: 297/210

(under subclass 209) Device comprising an additional coil spring positioned one directly above the other, and wherein one contracts while the other expands under load.