Patents by Inventor Jonathan Ray McClain

Jonathan Ray McClain 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).

  • Flow meter with magnetoresistive sensors and method of measuring flow
    Patent number: 7130750
    Abstract: A variable area flow meter has a magnet carried by a piston which is moved to a position representing fluid flow. An array of magnetoresistive bridge sensors adjacent the path of magnet movement senses the magnet position. The bridges are unbalanced by the magnet field. The analog unbalance signals are read and processed in digital form to develop a flow signal. The flow meter circuits are powered from a 4–20 MA current loop or a remote power supply. Each bridge sensor is powered only when the bridge unbalance signal is being read, to minimize the power requirement.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: October 31, 2006
    Assignee: Racine Federated, Inc.
    Inventors: Robert K. Stevens, Jonathan Ray McClain, Richard Little