US PATENT SUBCLASS 454 / 64
.~.~ Having sliding, communication, airway duct sections

Current as of: June, 1999
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454 /   HD   VENTILATION

49  DF  WORKSTATION VENTILATOR (E.G., HOOD, OFFTAKE, ETC.) {5}
63  DF  .~ Movable {2}
64.~.~ Having sliding, communication, airway duct sections

DEFINITION

Classification: 454/64

Having sliding, communicating, airway duct sections:

(under subclass 63) Subject matter comprising two or more connected air carrying conduit sections which move relative to one another by a smooth, gliding motion.

SEE OR SEARCH CLASS

137, Fluid Handling,

580, for a fluid handling system with a sliding joint between moveable parts of the system.

285, Pipe Joints or Couplings,

298, for sliding, communicating pipe sections.