Patents by Inventor Ray Keech

Ray Keech 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).

  • Electromagnetic flowmeter
    Patent number: 6256590
    Abstract: In an electromagnetic flowmeter, the conventional derivation of flow velocity is corrected or replaced by an alternative calculation to take into account estimated non-linear dependence of field strength produced by the coil with applied coil current. This can be used to enable more accurate measurement, over a wider range of coil current. The improved accuracy allows the coil current to be adjusted to optimise power consumption; the adjustment of coil current in this manner is another aspect of the invention.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: July 3, 2001
    Assignee: ABB Instrumentation Limited
    Inventor: Ray Keech