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. 10, 2001
Filed:
Dec. 28, 1998
Wayne A. Dessert, Rehoboth, MA (US);
Khoren Keusseyan, Arlington, MA (US);
Foxboro Company, Foxboro, MA (US);
Abstract
The invention relates to a vortex flow meter for ultra pure applications. The vortex flow meter of the invention employs a smooth and continuous fluorocarbon layer to coat a number of fluid accessible surfaces of the flowmeter. The coating prevents or minimizes contact between the process fluid and the fluid accessible surfaces of the flowmeter, thus allowing the flow meter to measure the flow rate of a process fluid having a level of purity of typically one part per trillion without contaminating the fluid. The flowmeter of the invention is advantageously less costly and more accurate than conventional flow meters for ultra pure applications.