Breath alcohol testing device

Details Breath alcohol testing device Breath alcohol testing device

1982-09-20

1984-12-11

Bernstein, Hiram H.

Measuring and testing

Gas analysis

Gas chromatography

7386462, 128719, 128730, 422 84, G01N 114

Patent

active

044870558

ABSTRACT:
In a breath alcohol testing device, including a breath-receiving tube, a fuel cell chamber communicating with the tube, a fuel cell within the chamber and a movable wall, for example, a diaphragm, mounted adjacent the fuel cell, to be moved reciprocably between a down position at which the wall is relatively close to the fuel cell and an up position at which the wall is relatively far from the fuel cell, the movement of the wall acting to pump breath to and from the fuel cell, the movable wall defines one wall of the fuel cell chamber, breath in the space between the movable wall and the fuel cell being in substantially unrestricted communication with the fuel cell.

REFERENCES:
patent: 3240068 (1966-03-01), Horeth et al.
patent: 3507704 (1970-04-01), Webb
patent: 3966579 (1976-06-01), Chang et al.
patent: 4297871 (1981-11-01), Wright et al.

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