Patents by Inventor Jacques Defourny

Jacques Defourny 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).

  • Process for marking the surface of a rolling mill
    Patent number: 4806731
    Abstract: A rolling mill is rotated while microscopic dents with peripheral ridges are formed by an intermittent laser beam in the presence of a gas jet directed at the beam impact zone. The output and the angle of incidence of the gas jet are controlled and microscopic dents are formed with a ridge on only part of their periphery. Steel sheet cold-rolled by means of such a roll has uniformly distributed hollows, each hollow partially surrounding an elevation.
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: February 21, 1989
    Inventors: Adolphe Bragard, Jacques Halleux, Frederic Terreur, Jacques Defourny
  • Monitoring resistance welding
    Patent number: 4341940
    Abstract: During each period in which electrical power is supplied to the electrodes one determines whether the weld is subject to flash, by means of an accelerometer on one of the electrode supports. The frequency of occurrence of flash indicates the quality of the welding operation.
    Type: Grant
    Filed: July 7, 1980
    Date of Patent: July 27, 1982
    Assignee: Centre de Recherches Metallurgiques-Centrum voor Research in de Metallurgie
    Inventor: Jacques Defourny
  • Electrode displacement monitoring in resistance welding
    Patent number: 4296304
    Abstract: One or two sensors are used to measure the displacement of a pair of electrodes relative to each other during resistance welding. The axis of the or each sensor is parallel to and as close as possible to the common alignment axis of the electrodes.
    Type: Grant
    Filed: September 19, 1978
    Date of Patent: October 20, 1981
    Assignee: Centre de Recherches Metallurgiques-Centrum voor Research in de Metallurgie
    Inventor: Jacques Defourny