04151843 is referenced by 53 patents and cites 13 patents.

An apparatus for administration of a gas to a human and the exhausting thereof including a gas flow control connected to one end of a gas administering device which has on the other end protrusions for sealing engagement with nostrils of the nose. A gas supply conduit is connected to the gas flow control and a gas exhaust conduit is connected to the gas flow control, the gas flow control causes an intake of gas through the supply conduit and said gas administering device and out said protrusions thereon upon inhalation of a user of the apparatus. The gas flow control causes the exhausting of exhaust gas from said gas administering device through said gas flow control and out said gas exhaust conduit to a gas collector upon expiration of the user of the apparatus.

The gas flow control causes the flow of fresh gas through a supply conduit to be blocked during user expiration.

Title
Apparatus for administration of a gas to a human and the exhausting thereof
Application Number
700083
Publication Number
4151843
Application Date
November 14, 1977
Publication Date
May 1, 1979
Inventor
Devin R Lacke
6927 Stevens Ave., Richfield, 55423
MN, US
John H Brekke
214 5th. Ave., Duluth, 55792
MN, US
Agent
Wicks & Nemer
IPC
A61M 16/00
View Original Source