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:
Oct. 04, 1983
Filed:
Oct. 19, 1981
Richard U Guth, Harrisburg, PA (US);
Other;
Abstract
A breath test simulator and method for accurately calibrating breath test instruments used to determine the concentration of ethyl alcohol in breath. The simulator includes concentric chambers filled with a known concentration of ethyl alcohol-water solution. Air flowed into the first chamber is bubbled up through the solution in that chamber, sputtered through openings formed in the wall separating the chambers, bubbled up through the solution of the second chamber and is flowed thence to the breath test instrument. The air pressure and temperature of the solutions are accurately controlled to assure the effluent precisely simulates human breath leaving a precisely known alcohol vapor concentration.