04274425 is referenced by 14 patents and cites 10 patents.

In a device for measuring redox gases, such as alcohol, in a person's breath, a disposable tubular mouthpiece forms an elongated flow passage and is displaceably securable in a measuring head. The mouthpiece has an opening at one end for blowing air into it and openings along its length for directing the air into the measuring head. A check valve is located in the flow passage so that air exhaled into the opening in the end of the mouthpiece can flow to the measuring head, but inhaling on the mouthpiece places the check valve in a closed position. The mouthpiece can be formed of a single molded piece or two tubular portions secured together. The end of the mouthpiece opposite the open end is closed and is spaced from the openings into the measuring head for forming a moisture chamber for collecting saliva.

Title
Mouthpiece for a redox gas measuring device
Application Number
6/34853
Publication Number
4274425
Application Date
April 30, 1979
Publication Date
June 23, 1981
Inventor
Volker Eibl
Munich
DE
Axel Terveen
Munich
DE
Peter Krause
Schonungen
DE
Dieter Lutz
Schweinfurt
DE
Assignee
Sachs Systemtechnik
DE
IPC
A61B 5/08
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