Naso-gastric oxygen mask Patent #: 4328797
ApplicationNo. 06/446045 filed on 12/01/1982
US Classes:128/206.12, Face mask covering a breathing passage128/206.15, With gas flow control valve128/206.17, With separate filter encircling element, or housing, securing filter on mask128/206.28, Covering nose and mouth128/207.12Valve for controlling gas flow
ExaminersPrimary: Recla, Henry J.
Assistant: Reichle, K. M.
Attorney, Agent or Firm
International ClassesA62B 18/00 (20060101)
A62B 18/02 (20060101)
AbstractA respirator with an improved exhaust valve and a flexible face piece which conforms to the shape of the face of the wearer. The respirator is compact and principally formed of transparent material to minimize attention to the wearer.
Field of SearchFace mask covering a breathing passage
With gas flow control valve
With frame, shaping means, reinforcement, or filter formed of wire
With separate filter encircling element, or housing, securing filter on mask
Covering nose and mouth
Including face mask covering nose and mouth
Means for removing substance from respiratory gas
Mask attached to ear
Mask adhesively attached to face
Face mask covering a breathing passage