Patents by Inventor Ann-Britt Ljungberg

Ann-Britt Ljungberg 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 cutting tool
    Patent number: 9157143
    Abstract: The present invention relates to a coated cutting tool comprising a PVD coating and a cemented carbide substrate comprising Co in an amount of 12.5-17 wt %, Cr in an amount such that the Cr/Co weight ratio is 0.05-0.15, a Ti of between 50 to 300 ppm by weight and a CW_Cr value between 0.8-0.97.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: October 13, 2015
    Assignee: Sandvik Intellectual Property
    Inventors: Marie Pettersson, Andreas Hedin, Axel Genvad, Ann-Britt Ljungberg, Lars Gustafsson, Roberth Ljunggren
  • COATED CUTTING TOOL
    Publication number: 20130202896
    Abstract: The present invention relates to a coated cutting tool comprising a PVD coating and a cemented carbide substrate comprising Co in an amount of 12.5-17 wt %, Cr in an amount such that the Cr/Co weight ratio is 0.05-0.15, a Ti of between 50 to 300 ppm by weight and a CW Cr value between 0.8-0.97.
    Type: Application
    Filed: May 31, 2011
    Publication date: August 8, 2013
    Applicant: SANDVIK INTELLECTUAL PROPERTY AB
    Inventors: Marie Pettersson, Andreas Hedin, Axel Genvad, Ann-Britt Ljungberg, Lars Gustafsson, Roberth Ljunggren
  • Coated insert
    Patent number: 7727592
    Abstract: The present invention relates to a cutting insert particularly for turning of stainless steel comprising a cemented carbide substrate and a post-treated coating with a substrate of cemented carbide having a composition of from about 5.0 to less than about 8.0 wt % Co, from about 3.0 to about 8.0 wt % cubic carbides of the metals Ti, Ta and Nb with a Ti/(Ti+Ta+Nb) ratio of from about 0.05 to about 0.3 and balance tungsten carbide (WC) having a grain size of from about 1.5 to about 3.5 ?m in the as-sintered state. Further, the substrate has a surface zone of from about 5 to about 30 ?m characterized by an enrichment of binder phase and a depletion of cubic carbides, and a coating having a first, innermost layer system of one or several layers of TiCxNyOz with x+y+z?1 with a total thickness of from about 0.7 to about 5.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: June 1, 2010
    Assignee: Sandvik Intellectual Property AB
    Inventors: Gunilla Cedergren, Mikael Lindholm, Ann-Britt Ljungberg, Mikael Lagerquist, Frida Cullin
  • CEMENTED CARBIDE INSERT
    Publication number: 20080299366
    Abstract: The present invention relates to a cutting tool insert for parting, grooving and threading in steel and stainless steels comprising a substrate and a coating. The substrate comprises WC, from about 7.5 to about 10.5 wt-% Co, from about 0.7 to about 1.1 wt-% Cr and from about 100 to about 300 ppm Ti. Ti may partly be replaced by Ta to a weight ratio Ti/Ta of equal to or more than about 0.8. The coating comprises two (Ti,Al)N-layers with different Al/Ti-ratios: an inner AlyTi1-yN-layer with y equals from about 0.4 to about 0.67 with a thickness of from about 0.3 to about 2.5 ?m and an outer AlwT1-wN layer with w equals from about 0.15 to about 0.35 with a thickness of from about 0.5 to about 5.0 ?m.
    Type: Application
    Filed: May 23, 2008
    Publication date: December 4, 2008
    Applicant: Sandvik Intellectual Property AB
    Inventors: Mats Ahlgren, Susanne Norgren, Anders Nordgren, Ann-Britt Ljungberg, Anders Jonsson, Ann-Marie Malm, Bo Blom, Martin Hansson
  • Coated insert
    Publication number: 20080286462
    Abstract: The present invention relates to a cutting insert particularly for turning of stainless steel comprising a cemented carbide substrate and a post-treated coating with a substrate of cemented carbide having a composition of from about 5.0 to less than about 8.0 wt % Co, from about 3.0 to about 8.0 wt % cubic carbides of the metals Ti, Ta and Nb with a Ti/(Ti+Ta+Nb) ratio of from about 0.05 to about 0.3 and balance tungsten carbide (WC) having a grain size of from about 1.5 to about 3.5 ?m in the as-sintered state. Further, the substrate has a surface zone of from about 5 to about 30 ?m characterized by an enrichment of binder phase and a depletion of cubic carbides, and a coating having a first, innermost layer system of one or several layers of TiCxNyOz with x+y+z?1 with a total thickness of from about 0.7 to about 5.
    Type: Application
    Filed: May 29, 2008
    Publication date: November 20, 2008
    Inventors: Gunilla Cedergren, Mikael Lindholm, Ann-Britt Ljungberg, Mikael Lagerquist, Frida Cullin
  • Coated insert
    Patent number: 7396371
    Abstract: The present invention relates to a cutting insert particularly for turning of stainless steel comprising a cemented carbide substrate and a post-treated coating with a substrate of cemented carbide having a composition of from about 5.0 to less than about 8.0 wt % Co, from about 3.0 to about 8.0 wt % cubic carbides of the metals Ti, Ta and Nb with a Ti/(Ti+Ta+Nb) ratio of from about 0.05 to about 0.3 and balance tungsten carbide (WC) having a grain size of from about 1.5 to about 3.5 ?m in the as-sintered state. Further, the substrate has a surface zone of from about 5 to about 30 ?m characterized by an enrichment of binder phase and a depletion of cubic carbides, and a coating having a first, innermost layer system of one or several layers of TiCxNyOz with x+y+z?1 with a total thickness of from about 0.7 to about 5.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: July 8, 2008
    Assignee: Sandvik Intellectual Property AB
    Inventors: Gunilla Cedergren, Mikael Lindholm, Ann-Britt Ljungberg, Mikael Lagerquist, Frida Cullin
  • Coated insert
    Publication number: 20060019117
    Abstract: The present invention relates to a cutting insert particularly for turning of stainless steel comprising a cemented carbide substrate and a post-treated coating with a substrate of cemented carbide having a composition of from about 5.0 to less than about 8.0 wt % Co, from about 3.0 to about 8.0 wt % cubic carbides of the metals Ti, Ta and Nb with a Ti/(Ti+Ta+Nb) ratio of from about 0.05 to about 0.3 and balance tungsten carbide (WC) having a grain size of from about 1.5 to about 3.5 ?m in the as-sintered state. Further, the substrate has a surface zone of from about 5 to about 30 ?m characterized by an enrichment of binder phase and a depletion of cubic carbides, and a coating having a first, innermost layer system of one or several layers of TiCxNyOz with x+y+z?1 with a total thickness of from about 0.7 to about 5.
    Type: Application
    Filed: June 24, 2005
    Publication date: January 26, 2006
    Applicant: Sandvik Intellectual Property HB
    Inventors: Gunilla Cedergren, Mikael Lindholm, Ann-Britt Ljungberg, Mikael Lagerquist, Frida Cullin