Mouthpiece for a redox gas measuring device

Details Mouthpiece for a redox gas measuring device Mouthpiece for a redox gas measuring device

1979-04-30

1981-06-23

Michell, Robert W.

Surgery

Truss

Pad

128730, 180272, 23232E, 23907, 422 84, A61B 508

Patent

active

042744253

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.

REFERENCES:
patent: 2591691 (1952-04-01), Forrester
patent: 3124124 (1964-03-01), Cross
patent: 3242921 (1966-03-01), Seeler
patent: 3764270 (1973-10-01), Collier et al.
patent: 3853477 (1974-12-01), Block et al.
patent: 3957046 (1976-05-01), Harris
patent: 4163390 (1979-08-01), Rodder

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