The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 1984
Filed:
Sep. 20, 1982
Karl Wolf, Webster Groves, MO (US);
Alcotek, Inc., Webster Groves, MO (US);
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.