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:
Jul. 24, 2007
Filed:
Jan. 26, 2004
Hans Hallstadius, Lund, SE;
Göran Ohlsson, Örkelljunga, SE;
Sven Gustafson, Lund, SE;
Bengt Jonasson, Hörby, SE;
Gert-inge Bertinsson, Lund, SE;
Hans Hallstadius, Lund, SE;
Göran Ohlsson, Örkelljunga, SE;
Sven Gustafson, Lund, SE;
Bengt Jonasson, Hörby, SE;
Gert-Inge Bertinsson, Lund, SE;
Gambro Lundia AB, Lund, SE;
Abstract
The invention relates to measurement of a fluid flow, wherein a flow rate component of the fluid is measured along a selected direction. A magnetic field whose polarity varies over time is applied to the fluid, which presumed to contain electrically charged elements. First and second sensor electrodes () are arranged to be wetted by the flowing fluid. The electrodes () are spaced apart from one another along a line being substantially perpendicular both to the selected flow direction and a magnetic axis of the magnetic field. A DC-level drift of the sensor electrodes () is prevented by supplying a control current (I; I) to each of the sensor electrode (), which has such sign and magnitude that a direct-current voltage level at the sensor electrodes () relative areference potential is controled towards a predetermined voltage (DC).