Patents by Inventor Satoru Kukino

Satoru Kukino 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: 20210309579
    Abstract: A composite sintered material includes: cubic boron nitride grains; and hexagonal boron nitride grains or the hexagonal boron nitride grains and wurtzite type boron nitride grains, wherein a dislocation density of the cubic boron nitride grains is more than or equal to 1×1015/m2 and less than or equal to 1×1017/m2, a median diameter d50 of equivalent circle diameters of the cubic boron nitride grains is more than or equal to 10 nm and less than or equal to 500 nm, and a relationship of the following expression 1 is satisfied: 0.015?(Vh+Vw)/(Vc+Vh+Vw)?0.5,??Expression 1 where Vc represents a volume-based content ratio of the cubic boron nitride grains, Vh represents a volume-based content ratio of the hexagonal boron nitride grains, and Vw represents a volume-based content ratio of the wurtzite type boron nitride grains.
    Type: Application
    Filed: March 18, 2020
    Publication date: October 7, 2021
    Inventors: Yuh ISHIDA, Satoru KUKINO, Michiko MATSUKAWA
  • Publication number: 20210268589
    Abstract: A cutting insert comprises: a body; and a blade fixed to the body and made of a polycrystalline cubic boron nitride including 98.5% by volume or more of cubic boron nitride, the blade having a rake face and a flank face, the rake face and the flank face meeting each other and thus forming a ridge line which serves as a cutting edge, the rake face being provided with a land surface extending along the cutting edge, and a chip breaker disposed on a side opposite to the cutting edge with the land surface therebetween and also having a recess contiguous to the land surface.
    Type: Application
    Filed: July 2, 2019
    Publication date: September 2, 2021
    Inventors: Tsutomu HIRANO, Satoru KUKINO
  • Publication number: 20210253483
    Abstract: A sintered material comprises cubic boron nitride and a first material that is a partially stabilized ZrO2 with Al2O3 dispersed therein at crystal grain boundaries and/or in crystal grains, the sintered material comprising 20% by volume or more and 80% by volume or less of the cubic boron nitride, the sintered material comprising 0.001% by mass or more and 1% by mass or less of nitrogen in the first material when the first material is measured through secondary ion mass spectrometry.
    Type: Application
    Filed: February 22, 2019
    Publication date: August 19, 2021
    Applicants: Sumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp.
    Inventors: Hisaya HAMA, Katsumi OKAMURA, Mayu AMEMIYA, Satoru KUKINO
  • 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: 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: 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: 20210238716
    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 plurality of aluminum oxide grains having an average grain size of less than or equal to 0.5 ?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 from 30 to 92 volume %, a content of the cubic boron nitride grains is from 3 to 40 volume %, a content of the aluminum oxide grains is from 2 to 15 volume %, and a content of the cobalt is from 3 to 30 volume %.
    Type: Application
    Filed: April 3, 2019
    Publication date: August 5, 2021
    Applicants: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Naoki Watanobe, Takashi Harada, Katsumi Okamura, Satoru Kukino, Taisuke Higashi
  • Publication number: 20210238036
    Abstract: A polycrystalline cubic boron nitride comprising 98.5% by volume or more of cubic boron nitride, wherein the cubic boron nitride has a dislocation density of more than 8×1015/m2, the polycrystalline cubic boron nitride comprises a plurality of crystal grains, and the plurality of crystal grains have a median diameter d50 of an equivalent circle diameter of 0.1 ?m or more and 0.5 ?m or less.
    Type: Application
    Filed: February 27, 2020
    Publication date: August 5, 2021
    Applicant: Sumitomo Electric Hardmetal Corp.
    Inventors: Michiko MATSUKAWA, Satoru KUKINO, Taisuke HIGASHI, Machiko ABE
  • Publication number: 20210238100
    Abstract: A polycrystalline cubic boron nitride comprising 96% by volume or more of cubic boron nitride, wherein the cubic boron nitride has a dislocation density of more than 8×1015/m2, the polycrystalline cubic boron nitride comprises a plurality of crystal grains, and the plurality of crystal grains have a median diameter d50 of an equivalent circle diameter of less than 100 nm.
    Type: Application
    Filed: February 27, 2020
    Publication date: August 5, 2021
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Michiko MATSUKAWA, Satoru KUKINO, Taisuke HIGASHI, Machiko ABE
  • 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
  • Patent number: 11065693
    Abstract: A cutting tool shim is to be disposed between a cutting insert and a holder and to be fixed to the holder. The ridgeline between the flank face and the rake face forms a cutting edge. The cutting edge includes an arc-shaped portion. A coolant supply path for jetting coolant to the arc-shaped portion is provided in the cutting tool shim, the coolant being supplied from the holder. The coolant supply path includes a lead-in port for leading the coolant from the holder to the coolant supply path, and a jetting port for arc-shaped portion for jetting the coolant to the arc-shaped portion. The jetting port for arc-shaped portion has a curved shape along the arc-shaped portion. The distance between the jetting port for arc-shaped portion and the arc-shaped portion is not less than 2.2 mm and not more than 8.1 mm.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: July 20, 2021
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Tsutomu Hirano, Satoru Kukino, Tomoyuki Fukuyama, Takuma Kishimoto
  • Patent number: 11052466
    Abstract: A cutting tool according to an aspect of the present disclosure includes a cutting edge portion which contains at least one of cubic boron nitride and polycrystalline diamond. The cutting edge portion includes a rake face, a flank face, and a cutting edge. The flank face is contiguous to the rake face. The cutting edge is provided as a ridge line between the rake face and the flank face. The radius of curvature of the cutting edge is 2 ?m or more and 8 ?m or less.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: July 6, 2021
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Gaku Harada, Yoshinori Tanigawa, Satoru Kukino
  • Publication number: 20210198772
    Abstract: A cubic boron nitride sintered material includes 40% by volume or more and 96% by volume or less of cubic boron nitride grains and 4% by volume or more and 60% by volume or less of a binder phase, and the cubic boron nitride grains have a dislocation density of less than 1×105/m2.
    Type: Application
    Filed: December 27, 2019
    Publication date: July 1, 2021
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Machiko ABE, Satoru KUKINO, Michiko MATSUKAWA
  • 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
  • Patent number: 11046581
    Abstract: The polycrystalline cubic boron nitride contains a cubic boron nitride at a content greater than or equal to 98.5% by volume, and has an area rate S1 of crystal grains, the crystal grains having an equivalent circle diameter greater than or equal to 1 ?m, less than or equal to 20 area % at a cross section of the polycrystalline cubic boron nitride as observed with a scanning electron microscope at a magnification of 10,000.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: June 29, 2021
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Tsutomu Hirano, Satoru Kukino
  • Patent number: 11033970
    Abstract: A cutting insert includes a bottom surface, a top surface opposite to the bottom surface, and a cutting edge portion. The cutting edge portion is located on the same side as the top surface. The cutting edge portion is formed of a sintered material including cubic boron nitride particles. A volume ratio of the cubic boron nitride particles to the sintered material is more than or equal to 50 percent. The cutting edge portion includes a rake face, a flank face contiguous to the rake face, and a cutting edge located along a ridgeline between the rake face and the flank face. The rake face is inclined toward the bottom surface so that a distance from the rake face to the bottom surface decreases gradually toward the cutting edge.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: June 15, 2021
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Gaku Harada, Satoru Kukino, Takashi Harada
  • Publication number: 20210171402
    Abstract: A sintered material includes a cubic boron nitride, a zirconium-containing oxide, a zirconium-containing nitride, and an aluminum-containing oxide, wherein the zirconium-containing nitride includes both or one of ZrN and ZrON, and the aluminum-containing oxide includes a type Al2O3.
    Type: Application
    Filed: March 4, 2019
    Publication date: June 10, 2021
    Applicants: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Katsumi OKAMURA, Hisaya HAMA, Mayu AMEMIYA, Satoru KUKINO
  • Publication number: 20210114117
    Abstract: A cutting insert includes a bottom surface, a top surface opposite to the bottom surface, and a cutting edge portion. The cutting edge portion is located on the same side as the top surface. The cutting edge portion is formed of a sintered material including cubic boron nitride particles. A volume ratio of the cubic boron nitride particles to the sintered material is more than or equal to 50 percent. The cutting edge portion includes a rake face, a flank face contiguous to the rake face, and a cutting edge located along a ridgeline between the rake face and the flank face. The rake face is inclined toward the bottom surface so that a distance from the rake face to the bottom surface decreases gradually toward the cutting edge.
    Type: Application
    Filed: October 16, 2019
    Publication date: April 22, 2021
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Gaku HARADA, Satoru KUKINO, Takashi HARADA
  • Publication number: 20210114124
    Abstract: An end mill has a shank and a cutting edge main body portion. The cutting edge main body portion is provided on the shank and has a coolant supply path. The cutting edge main body portion includes a trailing end surface on a side of the shank, and a leading end surface opposite to the trailing end surface. The coolant supply path has a tapered portion which widens in a direction from the trailing end surface toward the leading end surface.
    Type: Application
    Filed: March 22, 2018
    Publication date: April 22, 2021
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Nanako NAKAMURA, Yutaka KOBAYASHI, Satoru KUKINO