Patents by Inventor Didier Desruelles

Didier Desruelles 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).

  • Device for checking the thickness and the cohesion of the interface of a duplex tube
    Patent number: 5329561
    Abstract: The duplex tube (1) comprises a tubular core (2) and a cladding or covering layer (3) made from an alloy, the base metal of which is identical to the base metal of the alloy constituting the tubular core (2).
    Type: Grant
    Filed: February 12, 1993
    Date of Patent: July 12, 1994
    Assignees: Framatome, Cogema, Societe en nom Collectif Zircotube
    Inventor: Didier Desruelles
  • Method for checking the thickness and the cohesion of the interface of a duplex tube
    Patent number: 5225148
    Abstract: The duplex tube (1) comprises a tubular core (2) and a cladding or covering layer (3) made from an alloy, the base metal of which is identical to the base metal of the alloy constituting the tubular core (2).
    Type: Grant
    Filed: June 7, 1991
    Date of Patent: July 6, 1993
    Assignees: Framatome, Cogema
    Inventor: Didier Desruelles
  • Ultrasonic method of measuring the thickness of the plating on a metal tube, the corresponding apparatus and its application to Zr plated alloy tubes
    Patent number: 4918989
    Abstract: According to the method of the invention concerning tubes, of which the plating to be checked is at least 0.4 mm thick and in which the acoustic impedance differs by at least 1% relative from that of the core of the tube, a properly dampened transducer is selected which has a frequency of 4 to 10 MHz. The position of the transducer in respect to the tube is adjusted experimentally, and its parameters of distance and orientation are differently adjusted in order to increase the "signal-to-noise" ratio. For determining the thickness of the plating, at least one double echo from the interface between the plating and the tube core is used, or alternatively, a triple echo from this interface. Also, there is a corresponding ultrasonic measuring apparatus as well as an application of the method to the ultrasonic measuring of the thickness of the plating of Zr alloy tubes. The tubes are plated with non-alloyed Zr or with some other Zr alloy.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: April 24, 1990
    Assignee: Compagnie Europeenne du Zirconium - CEZUS
    Inventors: Didier Desruelles, Andre Bodin, Philippe Moinard