Patents by Inventor Pierre Donnadieu

Pierre Donnadieu 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).

  • Coated cemented carbide cutting tool insert
    Patent number: 8455116
    Abstract: The present invention relates to PVD coated cemented carbide cutting tool inserts semifinishing and finishing metal cutting operations. The cemented carbide cutting tool insert comprises a substrate and a wear resistant coating. The substrate comprises in addition to WC, from about 5.5 to about 8.5 wt-% Co and Cr such that the Cr/Co weight ratio is from about 0.08 to about 0.12 and also small amounts of Ti and Ta. The wear resistant coating is a homogeneous AlxTi1?xN-layer with x equals from about 0.6 to about 0.67. The thickness of this layer is from about 1 to about 3.8 ?m.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: June 4, 2013
    Assignee: Sandvik Intellectual Property AB
    Inventors: Pierre Donnadieu, Susanne Norgren
  • COATED CEMENTED CARBIDE CUTTING TOOL INSERT
    Publication number: 20080295658
    Abstract: The present invention relates to PVD coated cemented carbide cutting tool inserts semifinishing and finishing metal cutting operations. The cemented carbide cutting tool insert comprises a substrate and a wear resistant coating. The substrate comprises in addition to WC, from about 5.5 to about 8.5 wt-% Co and Cr such that the Cr/Co weight ratio is from about 0.08 to about 0.12 and also small amounts of Ti and Ta. The wear resistant coating is a homogeneous AlxTi1?xN-layer with x equals from about 0.6 to about 0.67. The thickness of this layer is from about 1 to about 3.8 ?m.
    Type: Application
    Filed: May 29, 2008
    Publication date: December 4, 2008
    Applicant: Sandvik Intellectual Property AB
    Inventors: Pierre Donnadieu, Susanne Norgren
  • System for regulating oil and fuel temperatures of a turbojet engine
    Patent number: 5615547
    Abstract: A system is disclosed for regulating oil and fuel temperatures in a turbojet engine having an engine accessory driven at constant speed by a power transmission which is driven by the turbojet engine. The system has a first closed oil circuit for circulating oil through the turbojet engine, a second closed oil circuit for circulating oil through the power transmission, a fuel circuit for supplying fuel to the turbojet engine, an air/oil heat exchanger connected to the first closed oil circuit to pass oil in heat exchange relationship with air, an oil/fuel heat exchanger connected to the fuel circuit and to the first closed oil circuit downstream of the air/oil heat exchanger to pass oil and fuel in heat exchange relationship, and an oil/oil heat exchanger connected to the first and second closed oil circuits to pass oil in heat exchange relationship, the connection to the first closed oil circuit being downstream of the oil/fuel heat exchanger.
    Type: Grant
    Filed: January 3, 1996
    Date of Patent: April 1, 1997
    Assignee: Societe Nationale D'Etude et de Construction de Moteurs D'Aviation S.N.E.C.M.A.
    Inventors: Bruno A. Beutin, Joel Creti, Jean-Pierre Donnadieu, Francis G. A. Garnier, Michel G. Hugues, Jean-Loic H. Lecordix, Claude P. H. Maignan, Gilles C. G. Massot, Jean-Marie N. Pincemin, Christophe J. F. Thorel, Carole C. Touron, Gerard M. R. M. Vennin