Patents by Inventor Warner C. Thelen

Warner C. Thelen 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 control apparatus and method with internally isothermal control volume for flow verification
    Patent number: 7204158
    Abstract: An internally isothermal control volume of a flow verification system for measuring gas pressure drop relative to time to calculate flow rate has a thermal reservoir provided therein. The thermal reservoir is de-coupled from ambient effects so that the temperature of the thermal reservoir will be driven to the gas temperature during steady state flow of gas through the known volume and during gas expansion, will transfer heat to maintain a contrast gas temperature for accurate gas flow rate calculation with minimal effect from external influence during the verification process.
    Type: Grant
    Filed: July 7, 2005
    Date of Patent: April 17, 2007
    Assignee: Parker-Hannifin Corporation
    Inventors: Daniel P. Morgan, Warner C. Thelen