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. 23, 1993
Filed:
Jan. 24, 1992
Lawrence B Marsh, Buckeystown, MD (US);
Marsh-McBirney, Inc., Frederick, MD (US);
Abstract
An electromechanical flowmeter includes a coil arrangement located completely outside the fluid conduit for producing a magnetic field that extends concentrically about the longitudinal axis of the conduit, the portion of the field adjacent the inner periphery of the conduit being stronger than that adjacent the center of the conduit. First electrodes are mounted on the interior wall surface of the conduit within the magnetic field, and second electrodes are arranged at a location generally unaffected by the field. In the preferred embodiment, the second electrode is mounted on the interior wall surface outside the magnetic field in longitudinally-spaced relation relative to the first electrodes, whereby the provision of any flow-obstructing electrode within the conduit is completely avoided. In a non-preferred embodiment, the second electrode is mounted centrally with the conduit relative to the longitudinal axis thereof. The field is produced by a pair of magnetic field generators--such as toroidal windings or squirrel cage windings--arranged with their magnetic axes extending circumferentially in the same direction relative to the conduit.