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Apparatus for control of oxygen and/or air flow to nasal prongs

  • US 20130199531A1
  • Filed: 04/09/2012
  • Published: 08/08/2013
  • Est. Priority Date: 02/06/2012
  • Status: Active Grant
First Claim
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1. An air or oxygen flow supply system between a supply source and nasal prongs applicable to a patient, comprisinga) a succession of flow ducts having different flow areas,b) there being junctions between successive of said ducts,c) said flow areas defined by A1, A2 - - - An where n>

  • 2,d) flow areas decreasing at junctions, inthe direction of said flow said flow areas at each junction being a duct outlet and a successive duct inlet, and wherein said outlet and inlet flow areas are proximate one another and substantially different, in size, whereby said inlet and outlet flow areas are free of elongated taper therebetween.

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