US PATENT SUBCLASS 128 / 204.18
.~ Means for supplying respiratory gas under positive pressure

Current as of: June, 1999
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128 /   HD   SURGERY

200.24  DF  RESPIRATORY METHOD OR DEVICE {32}
204.18.~ Means for supplying respiratory gas under positive pressure {17}
204.19  DF  .~.~> Permanent magnet included in gas flow control means
204.21  DF  .~.~> Electric control means {2}
204.24  DF  .~.~> Fluidic control device utilizing Coanda effect or jet impingement to alter fluid flow
204.25  DF  .~.~> Gas stream passed through jet nozzle or venturi passage
204.26  DF  .~.~> Gas supply means responsive to breathing {2}
204.29  DF  .~.~> Control means responsive to variation in ambient pressure
205.11  DF  .~.~> Means for varying air/oxygen ratio
205.12  DF  .~.~> Means for removing substance from respiratory gas
205.13  DF  .~.~> Respiratory gas supplied from expandable bag, bellows, or squeeze bulb {4}
205.18  DF  .~.~> Gas supplied by piston pump
205.19  DF  .~.~> Suction means for assisting exhalation
205.21  DF  .~.~> Means broken or pierced to supply gas
205.22  DF  .~.~> Gas container supported on body
205.23  DF  .~.~> Indicator structure
205.24  DF  .~.~> Valve, or valve control, structure
205.25  DF  .~.~> Face mask covering a breathing passage
205.26  DF  .~.~> Atmosphere enclosure (e.g., oxygen tent, hyperbaric chamber for pressurizing whole body, etc.)

DEFINITION

Classification: 128/204.18

Means for supplying respiratory gas under positive pressure:

(under subclass 200.24) Subject matter including a means for supplying a breathed gas to a living thing under pressure greater than ambient pressure.

(1) Note. A patent is placed in this subclass, or in an indent thereunder, even when the only claimed gas supply means is an expandable bag, bellows, or the like, on the ground that such a means holds gas under greater than ambient pressure when it is expanded against ambient pressure, as for example, when gas is exhaled by a person into the means and expands it.