US PATENT SUBCLASS 297 / 333
.~.~.~.~ Spring axis coaxial with pivot axis of bottom
Current as of:
June, 1999
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297 /
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CHAIRS AND SEATS
311
DF
MOVABLE BOTTOM
{5}
313
DF
.~ Tiltable {5}
331
DF
.~.~ Movable to inoperative position {3}
332
DF
.~.~.~ Biased to position {1}
333
.~.~.~.~ Spring axis coaxial with pivot axis of bottom
DEFINITION
Classification: 297/333
(under subclass 332) Device wherein the biasing means includes a resilient means which has an axis coincident with the turning axis of the bottom.
SEE OR SEARCH THIS CLASS, SUBCLASS:
292, for a resilient back biased by a coil spring which surrounds a horizontal pivot.
293, for a resilient back biased by a coil spring, which comprises a horizontal pivot.
SEE OR SEARCH CLASS
16, Miscellaneous Hardware,
72+, for spring-actuated door closers; and subclasses 277+ for spring hinges, per se. 248, Supports,
597, for a spiral biasing spring coaxial with a horizontal pivot.
