Patents by Inventor William E. O'Donnell

William E. O'Donnell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Liquid conduction indication in a magnetic flowmeter
    Patent number: 6611770
    Abstract: A magnetic flowmeter with an improved liquid conduction indication has a flowtube assembly with a passage for liquid flow and has an electromagnet mounted outside the passage that provides ramped magnetic excitation. An electrode circuit couples through the passage and generates ramp spikes and a flow signal. A processor receiving the flow signal and generating a flow rate output. The processor also receives the ramp spikes and generates a filtered integral of the ramp spikes as a liquid conduction or empty pipe indication.
    Type: Grant
    Filed: May 25, 2000
    Date of Patent: August 26, 2003
    Assignee: Rosemount Inc.
    Inventors: William E. O'Donnell, Thomas P. Coursolle, David L. Wehrs