US PATENT SUBCLASS 297 / 285
BACK MOVEMENT RESILIENTLY OPPOSED IN OPERATING POSITION

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

285BACK MOVEMENT RESILIENTLY OPPOSED IN OPERATING POSITION {12}
286  DF  .~> Resilient support includes armrest {3}
291  DF  .~> Spring centers back on pivot
292  DF  .~> Coil spring surrounds horizontal pivot
293  DF  .~> Coil spring comprises horizontal pivot
294  DF  .~> Resilient leg integral with bottom or back {1}
296  DF  .~> Back secured to resilient upright bar or rod {2}
299  DF  .~> Spring mounts terminal of back
300.1  DF  .~> Back and seat adjust simultaneously {1}
301.1  DF  .~> Back adjusts independent of seat {4}
302.1  DF  .~> Back and bottom adjust in a fixed relationship {4}
303.1  DF  .~> Adjustable resistance {3}
307  DF  .~> Constantly oriented during up-and-down movement {2}

DEFINITION

Classification: 297/285

(under the class definition) Device comprising an elastic, pliable, flexible, or springy apparatus associated with a

generally upright support member whereby displacement of the support member is resisted or countered in response to a force exerted by an occupant thereof.

(1) Note. Included here is a back mounted on another chair or seat component, as a bottom, which is resiliently mounted so that movement thereof results in movement of the back.

SEE OR SEARCH THIS CLASS, SUBCLASS:

339, for a portable back with means for attaching it to a bottom.

353+, for a movable back without resilient support means.

452.1+, for a resilient back, per se, and see the search notes thereto. SEE OR SEARCH CLASS

5, Beds,

652+, for a cushion, per se.

267, Spring Devices, appropriate subclasses, for a spring, per se.