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: 20210309580
    Abstract: A cubic boron nitride sintered material comprises 30% by volume or more and 99.9% by volume or less of cubic boron nitride grains and 0.1% by volume or more and 70% by volume or less of a binder phase, the cubic boron nitride grain having a carbon content of 0.08% by mass or less, the cubic boron nitride sintered material being free of free carbon.
    Type: Application
    Filed: December 16, 2019
    Publication date: October 7, 2021
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Akito ISHII, Katsumi OKAMURA
  • Publication number: 20210246076
    Abstract: The cubic boron nitride sintered material comprises 30% by volume or more and 80% by volume or less of cubic boron nitride grains and 20% by volume or more and 70% by volume or less of a binder phase, the cubic boron nitride grains having a dislocation density of 1×1015/m2 or more and 1×1017/m2 or less.
    Type: Application
    Filed: December 16, 2019
    Publication date: August 12, 2021
    Applicants: SUMITOMO ELECTRIC HARDMETAL CORP., Sumitomo Electric Industries, Ltd.
    Inventors: Hironari MOROGUCHI, Michiko MATSUKAWA, Satoru KUKINO, Akito ISHII, Katsumi OKAMURA, Machiko ABE, Kenta SANO
  • Publication number: 20210246078
    Abstract: A cubic boron nitride sintered material includes: more than or equal to 85 volume % and less than 100 volume % of cubic boron nitride grains; and a remainder of a binder, wherein the binder includes WC, Co and an Al compound, and when a TEM-EDX is used to analyze an interface region including an interface at which the cubic boron nitride grains are adjacent to each other, oxygen exists on a whole or part of the interface, and a width D of a region in which the oxygen exists is more than or equal to 0.1 nm and less than or equal to 10 nm.
    Type: Application
    Filed: September 18, 2019
    Publication date: August 12, 2021
    Applicants: Sumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp.
    Inventors: Katsumi OKAMURA, Yuichiro WATANABE, Akito ISHII, Takashi HARADA, Satoru KUKINO
  • Publication number: 20210246077
    Abstract: A cubic boron nitride sintered material comprises 30% by volume or more and 80% by volume or less of cubic boron nitride grains and 20% by volume or more and 70% by volume or less of a binder phase, the cubic boron nitride grains having a dislocation density of 3×1017/m2 or more and 1×1020/m2 or less.
    Type: Application
    Filed: December 16, 2019
    Publication date: August 12, 2021
    Applicants: SUMITOMO ELECTRIC HARDMETAL CORP., SUMITOMO ELECTRIC HARDMETAL CORP., Sumitomo Electric Industries, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Hironari MOROGUCHI, Michiko MATSUKAWA, Satoru KUKINO, Akito ISHII, Katsumi OKAMURA, Machiko ABE, Kenta SANO
  • Publication number: 20210246536
    Abstract: A method of producing a cubic boron nitride sintered material includes: forming an organic cubic boron nitride powder by attaching an organic substance onto a cubic boron nitride source material powder; preparing a powder mixture including more than or equal to 85 volume % and less than 100 volume % of the organic cubic boron nitride powder and a remainder of a binder source material powder by mixing the organic cubic boron nitride powder and the binder source material powder, the binder source material powder including WC, Co and Al; and obtaining the cubic boron nitride sintered material by sintering the powder mixture.
    Type: Application
    Filed: September 18, 2019
    Publication date: August 12, 2021
    Applicants: Sumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp.
    Inventors: Katsumi OKAMURA, Yuichiro WATANABE, Akito ISHII, Takashi HARADA, Satoru KUKINO
  • Publication number: 20210237227
    Abstract: A polycrystalline abrasive grain includes: a plurality of cBN particles; and a binder that binds the plurality of cBN particles, wherein the binder includes at least one of nitride, carbide, and carbonitride of one selected from a group consisting of a group 4a metal, a group 5a metal, and a group 6a metal in a periodic table, and a content of the binder in the polycrystalline abrasive grain is more than or equal to 5 volume % and less than or equal to 50 volume %.
    Type: Application
    Filed: April 24, 2019
    Publication date: August 5, 2021
    Applicants: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC HARDMETAL CORP., A.L.M.T. Corp.
    Inventors: Takashi HARADA, Katsumi OKAMURA, Akito ISHII, Satoru KUKINO, Nobuhide NAKAMURA, Tomokazu NAKAMURA
  • Publication number: 20210230073
    Abstract: The sintered material includes a powder-derived material containing one or both of a nitride and an oxynitride, each of which contains at least one first metal element selected from the group consisting of group 4 elements, group 5 elements and group 6 elements in the periodic table, the rate y1/x1 of the atomic ratio y1 of non-metal element atoms in the powder-derived material to the atomic ratio x1 of metal element atoms therein is greater than 1, and the powder-derived material has a cubic structure.
    Type: Application
    Filed: June 11, 2019
    Publication date: July 29, 2021
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Akito ISHII, Katsumi OKAMURA
  • Patent number: 11045872
    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: Grant
    Filed: April 19, 2017
    Date of Patent: June 29, 2021
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Akito Ishii, Takashi Harada, Katsumi Okamura, Satoru Kukino
  • Publication number: 20210094882
    Abstract: Provided is a cubic boron nitride sintered body including more than or equal to 85 volume percent and less than 100 volume percent of cubic boron nitride particles, and a remainder of a binder, wherein the binder contains WC, Co, and an Al compound, the binder contains W2Co21B6, and, when IA represents an X-ray diffraction intensity of a (111) plane of the cubic boron nitride particles, IB represents an X-ray diffraction intensity of a (100) plane of the WC, and IC represents an X-ray diffraction intensity of a (420) plane of the W2Co21B6, a ratio IC/IA of the IC to the IA is more than 0 and less than 0.10, and a ratio IC/IB of the IC to the IB is more than 0 and less than 0.40.
    Type: Application
    Filed: September 18, 2019
    Publication date: April 1, 2021
    Applicants: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Katsumi OKAMURA, Yuichiro WATANABE, Akito ISHII, Takashi HARADA, Satoru KUKINO
  • 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