Patent · US Expired

Mouthpiece for a redox gas measuring device

US4274425A · kind A · utility

17Cited by

7References

20Claims

0Family size

Assignee

Sachs Systemtechnik GmbH · DE

Inventors

Dieter Lutz · Schweinfurt, DE
Peter Krause · Acton, CA
Axel Terveen · Munich, DE
Volker Eibl

Key dates

Filing date	Apr 30, 1979
Grant date	Jun 23, 1981
Priority date	—
Expiry date	Apr 30, 1999

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T436/204165
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.