04487055 is referenced by 49 patents and cites 5 patents.

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.

Title
Breath alcohol testing device
Application Number
6/419972
Publication Number
4487055
Application Date
September 20, 1982
Publication Date
December 11, 1984
Inventor
Karl Wolf
Webster Groves
MO, US
Agent
Polster Polster and Lucchesi
Assignee
Alcotek
MO, US
IPC
G01N 1/14
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