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:
Oct. 20, 2009
Filed:
Aug. 23, 2007
Alexander Spivak, Eden Prairie, MN (US);
Odd Harald Steen Eriksen, Minneapolis, MN (US);
Felix Goldenberg, Sunrise, FL (US);
Alexander Grichener, Plymouth, MN (US);
Christopher Sanden, Eden Prairie, MN (US);
Joe Mctighe, Burnsville, MN (US);
Chuang-chia Lin, Lakeville, MN (US);
Alexander Spivak, Eden Prairie, MN (US);
Odd Harald Steen Eriksen, Minneapolis, MN (US);
Felix Goldenberg, Sunrise, FL (US);
Alexander Grichener, Plymouth, MN (US);
Christopher Sanden, Eden Prairie, MN (US);
Joe Mctighe, Burnsville, MN (US);
Chuang-Chia Lin, Lakeville, MN (US);
Rosemount Aerospace Inc., Burnsville, MN (US);
Abstract
A force balanced mass flow meter is disclosed that includes a cylindrical sensor housing having an interior bore, an impeller body supported for axial rotation within the interior bore of the sensor housing, and including structure for converting fluid inertia into flow induced torque when fluid flows relative to the impeller body, a proximity sensor for measuring a rotation angle of the impeller body relative to the sensor housing, an electromagnet for generating a magnetic field about the sensor housing to prevent rotation of the impeller body, electronics for determining electrical values from the proximity sensor when fluid flows relative to the impeller body and a controller for controlling current supplied to the electromagnet in response to electrical values determined from the proximity sensor, to generate a magnetic field sufficient to prevent impeller rotation.