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. 11, 2003
Filed:
Mar. 15, 2001
Applicant:
Inventors:
Anthony Byatt, Klingnau, CH;
Thomas Kleiner, Fislisbach, CH;
Daniel Matter, Brugg, CH;
Philippe Prêtre, Baden-Dättwil, CH;
Assignee:
ABB Research Ltd, Zurich, CH;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01F 1/66 ;
U.S. Cl.
CPC ...
G01F 1/66 ;
Abstract
A photoacoustic effect is used in order to measure a flow rate of a flowing medium (M), in particular of natural gas. A light emitter ( ) is used to produce in the medium (M) a sound wave (S) which is transmitted by the medium (M) and detected by a sound detector ( ). The light emitter ( ) is less exposed to the medium (M) than a diaphragm such as used in the ultrasonic method.