US PATENT SUBCLASS 297 / 362.13
.~.~.~.~.~ Gas or hydraulic cylinder

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  DF  .~.~.~ Mechanical operator tilts back fore and aft {3}
362.12  DF  .~.~.~.~ Actuated shaft {2}
362.13.~.~.~.~.~ Gas or hydraulic cylinder

DEFINITION

Classification: 297/362.13

Gas or hydraulic cylinder:

(under subclass 362.12) Device in which the actuated shaft is a reciprocating piston which is a part of a pneumatic or liquid operated piston-cylinder assembly.