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:
Apr. 06, 1982
Filed:
Jan. 14, 1980
Hans L Melgaard, Minneapolis, MN (US);
Gary H Mercier, Minneapolis, MN (US);
Despatch Industries, Inc., Minneapolis, MN (US);
Abstract
A gas analyzer calibration apparatus. The apparatus operably connects between a monitored gaseous environment and a gas analyzer. The apparatus includes a vacuum pump for drawing test gases from the monitored environment through the apparatus and through the analyzer. A fluidic gate selectively allows or impedes the flow of test gases to the analyzer and provides calibration gases to the analyzer at the analyzer's demand rate, and may be heated to prevent the condensation of hot test gases flowing therethrough. The fluidic gate will pass both span calibration gases and zero calibration gases, as desired. A vacuum breaker provides atmospheric gases for use as a zero calibration gas.