Patents by Inventor Gert KELLEZI

Gert KELLEZI 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).

  • Patent number: 10066279
    Abstract: The disclosure relates to a production of a semi-finished product for a manufacturing of objects, particularly tools, from a precipitation-hardenable alloy having a composition in wt. % of Co=15.0 to 30.0, Mo up to 20.0, W up to 25.0, Fe and manufacturing-specific impurities as a remainder. To achieve an economical, highly precise production of objects or tools of the above alloy with reduced effort, it is provided to prevent a formation of ordered structures of the Fe atoms and Co atoms in the matrix of the type (Fe+(29×Co))+approximately 1 wt. % Mo of the semi-finished product by a thermal special treatment, to thus improve a workability of the material.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: September 4, 2018
    Assignee: Boehler Edelstahl GmbH & Co. KG
    Inventors: Gert Kellezi, Robert Tanzer, Christoph Turk
  • Patent number: 9855603
    Abstract: Material and method for the production of material with isotropic, mechanical properties and improved wear resistance and high hardness potential. Method includes producing in a powder metallurgical (PM) method a slug or ingot from a material of ledeburite tool steel alloy, and subjecting one of the slug or ingot or a semi-finished product produced from the slug or ingot to full annealing at a temperature of over 1100° C., but at least 10° C. below the fusing temperature of the lowest melting structure phase with a duration of over 12 hrs. In this manner, an average carbide phase size of the material is increased by at least 65%, a surface shape of the material is rounded and a matrix is homogenized. Method further includes subsequently processing the material into thermally tempered tools with high wear resistance occurs or into parts to which abrasive stress is applied.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: January 2, 2018
    Assignee: Boehler Edelstahl GmbH & Co. KG
    Inventors: Gert Kellezi, Devrim Caliskanoglu
  • Patent number: 9597742
    Abstract: A saw blade (1) includes a tooth supporting body (2) and a plurality of teeth (3) being arranged at the tooth supporting body (2). Each of the plurality of teeth (3) includes a tooth tip (8) including a cutting portion (9). The cutting portion (9) and at least another part of the tooth tip (8) of the teeth (3) are made of a steel alloy that has been produced by powder metallurgy and full annealing.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: March 21, 2017
    Assignee: WIKUS-SAEGENFABRIK WILHELM H. KULLMANN GMBH & CO. KG
    Inventors: Joerg H. Kullmann, Gert Kellezi, Devrim Caliskanoglu
  • Patent number: 9090949
    Abstract: The invention relates to a method for the production of tools for a chip-removing machining of metallic materials and to a tool with improved wear resistance and/or high toughness. The invention further provides an alloyed steel with a chemical composition comprising carbon, silicon, manganese, chromium, molybdenum, tungsten, vanadium, and cobalt as well as aluminum, nitrogen, and iron. The alloyed steel may be used to make tools to a hardness of greater than 66 HRC and increased chip-removing machining performance.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: July 28, 2015
    Assignee: BOEHLER EDELSTAHL GMBH & CO. KG
    Inventors: Gert Kellezi, Devrim Caliskanoglu, Andreas Baernthaler
  • Publication number: 20150167132
    Abstract: The disclosure relates to a production of a semi-finished product for a manufacturing of objects, particularly tools, from a precipitation-hardenable alloy having a composition in wt. % of Co=15.0 to 30.0, Mo up to 20.0, W up to 25.0, Fe and manufacturing-specific impurities as a remainder. To achieve an economical, highly precise production of objects or tools of the above alloy with reduced effort, it is provided to prevent a formation of ordered structures of the Fe atoms and Co atoms in the matrix of the type (Fe+(29×Co))+approximately 1 wt. % Mo of the semi-finished product by a thermal special treatment, to thus improve a workability of the material.
    Type: Application
    Filed: December 2, 2014
    Publication date: June 18, 2015
    Applicant: BOEHLER EDELSTAHL GMBH & CO. KG
    Inventors: Gert KELLEZI, Robert TANZER, Christoph TURK
  • Publication number: 20130298743
    Abstract: A saw blade (1) includes a tooth supporting body (2) and a plurality of teeth (3) being arranged at the tooth supporting body (2). Each of the plurality of teeth (3) includes a tooth tip (8) including a cutting portion (9). The cutting portion (9) and at least another part of the tooth tip (8) of the teeth (3) are made of a steel alloy that has been produced by powder metallurgy and full annealing.
    Type: Application
    Filed: May 7, 2013
    Publication date: November 14, 2013
    Inventors: Joerg H. Kullmann, Gert Kellezi, Devrim Caliskanoglu
  • Publication number: 20120093679
    Abstract: The invention relates to a method for the production of tools for a chip-removing machining of metallic materials and to a tool with improved wear resistance and/or high toughness. The invention further provides an alloyed steel with a chemical composition comprising carbon, silicon, manganese, chromium, molybdenum, tungsten, vanadium, and cobalt as well as aluminum, nitrogen, and iron. The alloyed steel may be used to make tools to a hardness of greater than 66 HRC and increased chip-removing machining performance.
    Type: Application
    Filed: October 17, 2011
    Publication date: April 19, 2012
    Applicant: BOEHLER EDELSTAHL GMBH & CO. KG
    Inventors: Gert KELLEZI, Devrim CALISKANOGLU, Andreas BAERNTHALER