04564021 is referenced by 14 patents and cites 7 patents.

A tested person blows into an alcohol-breath measuring device through the mouthpiece. The mouthpiece must be kept under hygienic conditions and must be disposable, thus designed for single use by a tested person. The mouthpiece is an integral part injection molded of polypropylene, having a mouth portion, and a portion connecting to the measuring device and extending through the bottom of the mouth portion into the interior thereof. The tested person takes the mouthpiece between his lips and exhales through the connecting portion into the device. A limiting flange on the outside of the mouth portion limits the penetration thereof in the mouth and keeps saliva from the surface intended for holding. The mouthpiece may accommodate a check valve. A valve insert received in the mouth portion holds a valve plate which under the blow, elastically disengages from apertures in the bottom of the insert and applies against these apertures again as soon as the blowing ceases or the tested person inhales.

Title
Mouthpiece for a breath-alcohol measuring device
Application Number
522662
Publication Number
4564021
Application Date
January 18, 1985
Publication Date
January 14, 1986
Inventor
Martin Schmidt
Bad Schwartau
DE
Klaus Siegmann
Lubeck
DE
Agent
McGlew and Tuttle
Assignee
Dragerwerk
DE
IPC
A61B 10/00
A61M 16/00
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