US PATENT SUBCLASS 297 / 361.1
.~.~.~ Mechanical operator tilts back fore and aft

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

353  DF  MOVABLE BACK {2}
354.1  DF  .~ Tiltable {3}
354.12  DF  .~.~ Plural distinct occupant-supporting positions {11}
361.1.~.~.~ Mechanical operator tilts back fore and aft {3}
362  DF  .~.~.~.~> Gear train
362.11  DF  .~.~.~.~> Motor actuated
362.12  DF  .~.~.~.~> Actuated shaft {2}

DEFINITION

Classification: 297/361.1

Mechanical operator tilts back fore and aft:

(under subclass 354.12) Device including a mechanism such as a linkage system, gearing, motor, piston-cylinder assembly, etc., operable to tilt the back in a forward or backward direction.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

424.8, for screw and nut gearing, per se.