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:
Sep. 28, 1993
Filed:
Sep. 25, 1991
Gary P Corpron, Chanhassen, MN (US);
Rosemount Inc., Eden Prairie, MN (US);
Abstract
The flow tube of a ceramic material used for a magnetic flowmeter is formed with electrodes that are positioned in the wall of the tube and form a fluid tight fitting. The electrodes have a center plug made of a ceramic material with a metallization layer between the plug and the surface of the opening in the flow tube. The inner ends of the plugs are covered with a conductive ceramic electrode layer that electrically joins the metallization on the plugs to couple the EMF generated by the flowing fluid to the exterior of the flow tube. The conductive ceramic layer is engaged by the fluid in the flowmeter to protect the metallization from erosion. The electrodes are connected to suitable circuitry on their exterior ends.