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:
Mar. 12, 2002
Filed:
Jun. 30, 1999
Craig Brainerd Van Cleve, Lyons, CO (US);
Gregory Treat Lanham, Longmont, CO (US);
Robert Barclay Garnett, Arvada, CO (US);
Curtis John Ollila, Westminster, CO (US);
Rachael Esther Cohen, Niwot, CO (US);
Micro Motion, Inc., Boulder, CO (US);
Abstract
A balance bar for a straight tube Coriolis flowmeter. The balance bar is preferably manufactured by process that provides an increased number of flowmeter elements integral to the balance bar. These integral elements comprise: brace bars at each end of the balance bar, rib elements on each side of the balance bar to raise the horizontal vibration frequency, a surface to facilitate the mounting of a driver to the balance bar and to a flow tube surrounded by the balance bar, surfaces to facilitate the mounting of sensors to the balance bar and flow tube, voids that lower the resonant frequency of the balance bar in a drive plane, and a cavity that makes the vibration amplitude of the balance bar less than that of the flow tube. These elements lower the resonant frequency of the balance bar to make the flowmeter calibration factor independent of density. The balance bar is ideally made by a casting process. The balance bar may be also fabricated by other processes including machining.