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. 20, 1982
Filed:
Jun. 04, 1980
LGZ Landis & Gyr Zug AG, Zug, CH;
Abstract
An apparatus for ultrasonically determining fluid flow passing through a measurement section includes a tube which has two ends and an average predetermined inner cross-sectional area; the tube constitutes the measurement section. A sound-emitting transducer is disposed near one end of the tube, which has a first sound-transfer surface, and a sound-receiving transducer disposed near the other end of the tube, which has a second sound transfer surface. Each sound transfer surface is disposed at a sufficiently large predetermined distance from a corresponding end of the tube, so as to permit the fluid flowing through the tube. A fluid-receiving chamber communicates with the one end of the tube, and has a first average cross-sectional area, and a fluid-discharge chamber communicates with the other end of the tube, and has a second average cross-sectional area. The tube extends through the chambers, and each of the first and second cross-sectional areas exceeds the inner cross-sectional area by a factor of at least two. At least one of the chambers surrounds a corresponding end of the tube along at least a portion of the tube exceeding the average inner width thereof.