Patents by Inventor Steven James Johnston

Steven James Johnston 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).

  • Coriolis flowmeter having a reduced flag dimension
    Patent number: 6308580
    Abstract: A Coriolis flowmeter sensor having a reduced flag dimension. In order to have a reduced flag dimension, the entire length of the flow tubes must vibrate to make the flowmeter sensor more sensitive to Coriolis effects. When the entire length of the flow tubes vibrate, a first set of brace bars connected to the flow tube separates the frequencies of vibration in the flow tubes. A second set of brace bars connected to the flow tubes enhances the zero stability of the flowmeter.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: October 30, 2001
    Assignee: Micro Motion, Inc.
    Inventors: Matthew T. Crisfield, Steven James Johnston, John Richard McCarthy