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:
Nov. 30, 2004
Filed:
Apr. 03, 2003
Applicant:
Inventors:
Eric Kelner, San Antonio, TX (US);
Ali Minachi, San Antonio, TX (US);
Thomas E. Owen, Helotes, TX (US);
Marion Burzynski, Jr., Converse, TX (US);
Steven P. Petullo, Fairfax, VA (US);
Assignee:
Southwest Research Institute, San Antonio, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 2/918 ; G01N 2/902 ; G01N 2/924 ;
U.S. Cl.
CPC ...
G01N 2/918 ; G01N 2/902 ; G01N 2/924 ;
Abstract
A sensor for measuring the speed of sound in a gas. The sensor has a helical coil, through which the gas flows before entering an inner chamber. Flow through the coil brings the gas into thermal equilibrium with the test chamber body. After the gas enters the chamber, a transducer produces an ultrasonic pulse, which is reflected from each of two faces of a target. The time difference between the two reflected signals is used to determine the speed of sound in the gas.