Patents by Inventor Akito Ishii

Akito Ishii 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).

  • Publication number: 20200156213
    Abstract: There is provided a super-abrasive grain including: a body composed of cubic boron nitride or diamond; and a ceramic coating film coating at least a portion of a surface of the body.
    Type: Application
    Filed: December 6, 2018
    Publication date: May 21, 2020
    Applicants: Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.
    Inventors: Akito ISHII, Katsumi OKAMURA, Tomokazu NAKAMURA, Nobuhide NAKAMURA
  • Publication number: 20200130061
    Abstract: A sintered material has 3 vol % to 80 vol % of cBN grains and a binder. The binder contains: one or more types selected from the group consisting of one or more types of compounds composed of one or more types of first elements selected from the group consisting of a group 4 element, a group 5 element and a group 6 element in the periodic table, Al and Si and one or more types of second elements selected from the group consisting of C, N, O and B, and a solid solution of these compounds; and one or more types of metallic elements selected from the group consisting of Li, Ca, Na, Sr, Ba and Be. The binder contains the one or more types of metallic elements in an amount of 0.001 mass % to 0.5 mass % or less in total, and oxygen in an amount of 0.1 mass % to 10.0 mass %.
    Type: Application
    Filed: July 26, 2018
    Publication date: April 30, 2020
    Applicants: Sumitomo Electric Industries, Ltd, SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Katsumi OKAMURA, Akito ISHII, Satoru KUKINO
  • Publication number: 20200102252
    Abstract: A composite sintered material includes a plurality of diamond grains, a plurality of cubic boron nitride grains, and a remainder of a binder phase, wherein the binder phase includes cobalt, a content of the cubic boron nitride grains in the composite sintered material is more than or equal to 3 volume % and less than or equal to 40 volume %, and an average length of line segments extending across continuous cubic boron nitride grains in appropriately specified straight lines extending through the composite sintered material is less than or equal to a length three times as large as an average grain size of the cubic boron nitride grains.
    Type: Application
    Filed: June 6, 2018
    Publication date: April 2, 2020
    Applicants: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Naoki WATANOBE, Takashi HARADA, Katsumi OKAMURA, Akito ISHII, Satoru KUKINO, Taisuke HIGASHI
  • Publication number: 20200055780
    Abstract: A sintered material includes a first phase and a second phase, wherein the first phase is composed of cubic boron nitride particles, and the following relational expressions are satisfied when more than or equal to two cubic boron nitride particles adjacent to and in direct contact with each other among the cubic boron nitride particles are defined as a contact body, Di represents a length of an entire perimeter of the contact body, n represents the number of contact locations at which the cubic boron nitride particles are in direct contact with each other, dk represents a length of each of the contact locations, and ?dk (where k=1 to n) represents a total length of the contact locations: Dii=Di+(2×?dk (where k=1 to n)); and [(Dii?Di)/Dii]×100?50.
    Type: Application
    Filed: February 15, 2018
    Publication date: February 20, 2020
    Applicant: Sumitomo Electric industries, Ltd.
    Inventors: Akito ISHII, Katsumi OKAMURA
  • Patent number: 10532951
    Abstract: A sintered material includes a first material and a second material, the first material being partially stabilized ZrO2 having a crystal grain boundary or crystal grain in which 5 to 90 volume % of Al2O3 is dispersed with respect to a whole of the first material, the second material including at least one of SiAlON, silicon nitride and titanium nitride, the sintered material including 1 to 50 volume % of the first material.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: January 14, 2020
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kentaro Chihara, Satoru Kukino, Akito Ishii
  • Publication number: 20190271062
    Abstract: A composite sintered material includes: a plurality of diamond grains having an average grain size of less than or equal to 10 ?m; a plurality of cubic boron nitride grains having an average grain size of less than or equal to 2 ?m; and a remainder of a binder phase, wherein at least parts of adjacent diamond grains are bound to one another, the binder phase includes cobalt, in the composite sintered material, a content of the diamond grains is more than or equal to 30 volume % and less than or equal to 94 volume %, a content of the cubic boron nitride grains is more than or equal to 3 volume % and less than or equal to 40 volume %, and a content of the cobalt is more than or equal to 3 volume % and less than or equal to 30 volume %.
    Type: Application
    Filed: October 10, 2017
    Publication date: September 5, 2019
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Katsumi Okamura, Naoki Watanobe, Akito Ishii, Takashi Harada, Satoru Kukino, Taisuke Higashi
  • Publication number: 20190240739
    Abstract: A sintered material includes a first material and a second material, wherein the first material is partially stabilized ZrO2 in which 1 to 90 volume % of Al2O3 is dispersed in crystal grain boundaries or crystal grains, the Al2O3 is a grain having a grain size of less than or equal to 1 ?m, and the second material is at least one compound selected from a group consisting of a carbide, a nitride, and a carbonitride, and 5 to 95 volume % of the second material is included in the sintered material.
    Type: Application
    Filed: July 10, 2017
    Publication date: August 8, 2019
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Akito ISHII, Takashi HARADA, Katsumi OKAMURA, Saturo KUKINO
  • Publication number: 20190118256
    Abstract: An alloy powder contains greater than or equal to 3% by mass and less than or equal to 30% by mass of tungsten, greater than or equal to 2% by mass and less than or equal to 30% by mass of aluminum, greater than or equal to 0.2% by mass and less than or equal to 15% by mass of oxygen, and at least one of cobalt and nickel as the balance. The alloy powder has an average particle diameter of greater than or equal to 0.1 ?m and less than or equal to 10 ?m.
    Type: Application
    Filed: April 19, 2017
    Publication date: April 25, 2019
    Inventors: Akito Ishii, Takashi Harada, Katsumi Okamura, Satoru Kukino
  • Publication number: 20190076920
    Abstract: A sintered material contains hard particles composed of one or more selected from the group consisting of cubic boron nitride, Al2O3, AlON, SiAlON, TiC, TiCN, TiN, WC, and diamond, a metallic binder phase mainly composed of Co or Ni and containing at least one element selected from the group consisting of Co, Ni, Al, W, V, and Ti, and Al2O3 dispersed in the metallic binder phase.
    Type: Application
    Filed: October 28, 2016
    Publication date: March 14, 2019
    Inventors: Akito Ishii, Naoki Watanobe, Takashi Harada, Satoru Kukino
  • Publication number: 20180215669
    Abstract: A sintered material includes a first material and a second material, the first material being partially stabilized ZrO2 having a crystal grain boundary or crystal grain in which 5 to 90 volume % of Al2O3 is dispersed with respect to a whole of the first material, the second material including at least one of SiAlON, silicon nitride and titanium nitride, the sintered material including 1 to 50 volume % of the first material.
    Type: Application
    Filed: January 5, 2017
    Publication date: August 2, 2018
    Inventors: Kentaro Chihara, Satoru Kukino, Akito Ishii
  • Patent number: 10023499
    Abstract: A hard material which, when used as a material of a sintered material, makes it possible to obtain a sintered material with excellent abrasion resistance, a sintered material, a cutting tool including the sintered material, a method for manufacturing the hard material and a method for manufacturing the sintered material are provided. The hard material contains aluminum, nitrogen, and at least one element selected from the group consisting of titanium, chromium, and silicon, and has a cubic rock salt structure.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: July 17, 2018
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Harada, Akito Ishii, Satoru Kukino
  • Patent number: 9988315
    Abstract: A sintered body of the present invention is a sintered body including a first material and cubic boron nitride. The first material is partially-stabilized ZrO2 including 5 to 90 volume % of Al2O3 dispersed in crystal grain boundaries or crystal grains of partially-stabilized ZrO2.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: June 5, 2018
    Assignees: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Akito Ishii, Takashi Harada, Katsumi Okamura, Satoru Kukino
  • Publication number: 20170297118
    Abstract: There are provided: a sintered material having an excellent wear resistance even under a high speed cutting condition; a tool using the sintered material; and a method of producing the sintered material. The sintered material includes: a first particle group including a particle having a cubic rock-salt structure represented by Al(1-x)CrxN (formula (1)) (where x satisfies 0.2?x?0.8); and a second particle group including a particle of at least one first compound selected from a group consisting of oxide and oxynitride of aluminum, zirconium, yttrium, magnesium, and hafnium.
    Type: Application
    Filed: September 29, 2015
    Publication date: October 19, 2017
    Inventors: Akito Ishii, Satoru Kukino, Takashi Harada
  • Publication number: 20170233295
    Abstract: A sintered body of the present invention is a sintered body including a first material and cubic boron nitride. The first material is partially-stabilized ZrO2 including 5 to 90 volume % of Al2O3 dispersed in crystal grain boundaries or crystal grains of partially-stabilized ZrO2.
    Type: Application
    Filed: April 20, 2016
    Publication date: August 17, 2017
    Applicants: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Akito Ishii, Takashi Harada, Katsumi Okamura, Satoru Kukino
  • Publication number: 20170217838
    Abstract: A hard material which, when used as a material of a sintered material, makes it possible to obtain a sintered material with excellent abrasion resistance, a sintered material, a cutting tool including the sintered material, a method for manufacturing the hard material and a method for manufacturing the sintered material are provided. The hard material contains aluminum, nitrogen, and at least one element selected from the group consisting of titanium, chromium, and silicon, and has a cubic rock salt structure.
    Type: Application
    Filed: August 4, 2015
    Publication date: August 3, 2017
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Harada, Akito Ishii, Satoru Kukino