Patents by Inventor Claude Rohart

Claude Rohart 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).

  • Composite magnetic material with reduced permeability and losses
    Patent number: 6120916
    Abstract: A composite magnetic material showing reduced losses and reduced permeability when it is subjected to a magnetic field at frequencies below approximately 100 MHz. It comprises magnetic particles in the form of wafers dispersed in a dielectric binder. The polycrystalline magnetic ceramic wafers are oriented so that their main faces are substantially parallel to the magnetic field.Application especially to cores of inductors or transformers.
    Type: Grant
    Filed: September 9, 1996
    Date of Patent: September 19, 2000
    Assignee: Thomson-CSF
    Inventors: Jean-Pierre Delvinquier, Richard Lebourgeois, Michel Pate, Claude Rohart
  • Low-loss ferrite working between 1 MHZ and 100 MHZ and method of manufacture
    Patent number: 6071430
    Abstract: Disclosed is a ferrite material having low magnetic losses at frequencies of about 1 megahertz to 100 megahertz, and having firing and sintering temperatures lower than about 1000.degree. C. The material is a nickel-zinc-copper material with cobalt substitution, particularly well suited to the making of magnetic cores and more specifically to the making of micro-inductors.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: June 6, 2000
    Assignee: Thomson-CSF
    Inventors: Richard Lebourgeois, Adele Le Fur, Claude Rohart
  • Combined magnetic core
    Patent number: 5748013
    Abstract: A magnetic core includes a body made of polycrystalline ceramic and at least one localized gap made of a composite magnetic material. The gap may be preferably fixedly joined to the body by bonding or molding. The magnetic core has applications in inductors or transformers. The inductor preferably has a coil located on the body, which coil is preferably made of multistranded enameled wires.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: May 5, 1998
    Assignee: Thomson-CSF
    Inventors: Fran.cedilla.ois Beauclair, Jean-Pierre Delvinquier, Richard Lebourgeois, Michel Pate, Claude Rohart