Patents by Inventor Yves Lefevre

Yves Lefevre 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).

  • Viscosity sensor and regulator for continuously controlling a quenching bath
    Patent number: 6427525
    Abstract: A viscosity sensor operates by measuring the time taken for a piston to fall within the measuring chamber of a calibrated tube immersed in a bath, and an apparatus comprising the sensor is used for the continuous control of a quenching bath. A cam or an equivalent mechanism is used to lift a mobile assembly having a sensor in its upper part and a piston in its lower part. The sensor detects the passage of a pair of shoulders and passes the data on to a regulator for further processing.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: August 6, 2002
    Assignee: Process Industries
    Inventors: Yves Lefevre, Fabrice Vanaquer