Patents by Inventor Thomas W. Felt

Thomas W. Felt 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).

  • Flowmeter measuring chamber
    Patent number: 5359892
    Abstract: A flowmeter measuring chamber having a generally cylindrical outer wall, a generally cylindrical inner wall, and a piston, having a tubular wall disposed between the inner and outer walls and arranged to oscillate within the outer wall, is provided with a mechanism for controlling movement of the tubular wall. That movement is controlled so that a capillary space is maintained between the tubular wall and the inner wall and between the tubular wall and the outer wall at all positions of the piston and contact between the tubular wall and the inner and outer walls is prevented.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: November 1, 1994
    Inventor: Thomas W. Felt