Patents by Inventor Patrick Adragna

Patrick Adragna 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 and device for restoring the tightness of connecting elements such as water boxes of alternators with a mixed water-hydrogen cooling system
    Patent number: 5793014
    Abstract: The process comprises separating the connecting element (3) from one of the pipes (4) which connects it to the circuit so as to open up an opening (6) of the connecting element and thereby gain access to the interior of the connecting element while leaving the latter in position in the circuit of the alternator, descaling at least a part of the interior surface of the connecting element by removal of an oxidized layer covering the interior surface (18) by use of a laser beam (16) introduced in the interior chamber (19) of the connecting element (3), cleaning the interior chamber (19) of the connecting element by suction of particles of matter resulting from the action of the laser beam (16), depositing a layer of brazing material on the surface (18) of the interior chamber (19) of the connecting element whose tightness must be restored, and melting the brazing material by means of the laser beam (16).
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: August 11, 1998
    Assignee: Electricite de France - Service National
    Inventors: Lucien Sobkowiak, Patrick Adragna