Patents by Inventor Keiichi Tsuda

Keiichi Tsuda 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: 11117196
    Abstract: A surface-coated cutting tool includes a substrate and a coating film that coats the substrate, wherein the coating film includes a WC1-x layer composed of a compound represented by WC1-x, where x is more than or equal to 0.54 and less than or equal to 0.58, and the compound represented by WC1-x includes a hexagonal crystal structure.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: September 14, 2021
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Sachiko Koike, Yuki Ueda, Keiichi Tsuda
  • Patent number: 10987739
    Abstract: Provided are a cemented carbide having excellent plastic deformation resistance and a cutting tool in which the cemented carbide is used as a substrate. A cemented carbide includes a hard phase containing tungsten carbide particles and a binder phase containing, as a main component, an iron-group element, wherein the formula B/A?0.05 is satisfied, where A represents the number of the tungsten carbide particles, and B represents the number of tungsten carbide particles whose number of contact points with other tungsten carbide particles is 1 or less. Preferably, the iron-group element includes cobalt, and the cobalt content in the cemented carbide is 8% by mass or more. Preferably, the tungsten carbide particles have an average particle diameter of 3 ?m or more.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: April 27, 2021
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Tsuyoshi Yamamoto, Michiko Matsukawa, Yasuki Kido, Keiichi Tsuda
  • Publication number: 20210061660
    Abstract: A titanium carbonitride powder for use as a starting material for a hard material satisfies a D50 of from 2.0 ?m to 6.0 ?m and a D10/D90 of from 0.20 to 0.50, wherein D50 is a particle size at a cumulative percentage of 50% of a particle size distribution by volume, D10 is a particle size at a cumulative percentage of 10% of the particle size distribution by volume, and D90 is a particle size at a cumulative percentage of 90% of the particle size distribution by volume.
    Type: Application
    Filed: July 31, 2017
    Publication date: March 4, 2021
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Kosuke FUKAE, Masato MICHIUCHI, Keiichi TSUDA
  • Publication number: 20210040587
    Abstract: Provided is a cemented carbide including a first hard phase and a binder phase, the first hard phase consisting of WC, the binder phase being composed of either three elements which are Co, Ni and Cr or four elements which are Co, Ni, Cr and Mo, when a Co content is M1, a total content of Cr and Mo is M2, a total content of Ni, Cr, and Mo is M3, and a total content of Co, Ni, Cr, and Mo is M4, ratio M1/M4 being from 15 to 50%, ratio M2/M3 being from 15 to 40%, a ratio of an area of Cr/Mo-rich particles being lower than 1%, wherein the Cr/Mo-rich particles are particles constituting a region where a concentration of at least one of Cr and Mo is higher than the ratio of M1 to M4 in cross sectional elemental mapping of the cemented carbide.
    Type: Application
    Filed: September 20, 2019
    Publication date: February 11, 2021
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takato YAMANISHI, Keiichi TSUDA
  • Publication number: 20210025038
    Abstract: Cemented carbide contains first hard-phase particles containing WC, second hard-phase particles which contain carbonitride containing at least Ti and Nb, and a metallic binder phase containing an iron-group element. The second hard-phase particle includes a granular core portion. The core portion contains composite carbonitride expressed as Ti1?X?YNbXWYC1?ZNZ, where X is not smaller than 0.1 and not greater than 0.2, Y is not smaller than 0 and not greater than 0.05, and Z is not smaller than 0.3 and not greater than 0.6. The cemented carbide has an absolute value of a difference not greater than 10, between a ratio (%) of an area occupied by the second hard-phase particles at a surface thereof and a ratio (%) of an area occupied by the second hard-phase particles in a region extending from the surface by 0.5 mm in a direction of depth.
    Type: Application
    Filed: January 29, 2019
    Publication date: January 28, 2021
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Kosuke FUKAE, Hiroaki GOTOU, Masato MICHIUCHI, Keiichi TSUDA
  • Publication number: 20200391298
    Abstract: A hard material includes a first hard phase containing titanium carbonitride as a major constituent and a binder phase containing an iron group element as a major constituent. In any surface or cross-section of the hard material, the grain size D50 at a cumulative percentage of 50% of a grain size distribution by area of the first hard phase is 1.0 ?m or more, and the average aspect ratio of first hard phase particles having grain sizes larger than or equal to D50 is 2.0 or less.
    Type: Application
    Filed: May 29, 2017
    Publication date: December 17, 2020
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Masato MICHIUCHI, Kosuke FUKAE, Keiichi TSUDA
  • Patent number: 10858252
    Abstract: A complex carbonitride powder contains Ti as a main component element and at least one additional element selected from the group consisting of Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al, and Si. The complex carbonitride powder includes a plurality of complex carbonitride particles containing Ti and the additional element. The plurality of complex carbonitride particles include a plurality of homogeneous composition particles where average concentrations of Ti and the additional element in each complex carbonitride particle have a difference in a range of greater than or equal to ?5 atom % and less than or equal to 5 atom % from average concentrations of Ti and the additional element in the whole complex carbonitride powder. A cross-sectional area of the homogeneous composition particles is greater than or equal to 90% of a cross-sectional area of the complex carbonitride particles 1p.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: December 8, 2020
    Assignees: Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.
    Inventors: Masato Michiuchi, Keiichi Tsuda, Yoshihiro Minato, Tomoyuki Ishida, Akihide Matsumoto, Takehiko Hayashi
  • Patent number: 10689748
    Abstract: At least one layer in a coating located on a surface of a substrate is a domain structure layer constituted of two or more domains different in composition. The average value of the size of each of first domains, defined as the diameter of a virtual circumcircle in contact with each first domain, is 1 nm to 10 nm. The average value of the nearest neighbor distance of each first domain, defined as the length of the shortest straight line connecting the center of the circumcircle with the center of another circumcircle adjacent to the circumcircle, is 1 nm to 12 nm. 95% or more of the first domains has a size within ±25% of the average value of the size, and 95% or more of the first domains has a nearest neighbor distance within ±25% of the average value of the nearest neighbor distance.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: June 23, 2020
    Assignees: Sumitomo Electric Industries, Ltd., Mimsi Materials AB
    Inventors: Yoshiharu Utsumi, Paer Christoffer Arumskog, Keiichi Tsuda, Konstantinos Sarakinos, Daniel Gunnar Magnfaelt
  • Publication number: 20200171582
    Abstract: A surface-coated cutting tool includes a substrate and a coating film that coats the substrate, wherein the coating film includes a WC1-x layer composed of a compound represented by WC1-x, where x is more than or equal to 0.54 and less than or equal to 0.58, the compound represented by WC1-x includes a hexagonal crystal structure, and a ratio 1(110)/1(011) of an X-ray diffraction intensity of a (110) plane to an X-ray diffraction intensity of a (011) plane in the WC1-x layer is more than or equal to 0.1 and less than or equal to 0.4.
    Type: Application
    Filed: March 14, 2019
    Publication date: June 4, 2020
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Sachiko KOIKE, Yuki UEDA, Keiichi TSUDA
  • Publication number: 20200171581
    Abstract: A surface-coated cutting tool includes a substrate and a coating film that coats the substrate, wherein the coating film includes a WC1-x layer composed of a compound represented by WC1-x, where x is more than or equal to 0.54 and less than or equal to 0.58, the compound represented by WC1-x includes a hexagonal crystal structure, and a maximum point of a peak exists in a range of 31.2 to 31.4 eV in a spectrum diagram of a 4f orbital of a tungsten element obtained when measuring the WC1-x layer by an X-ray photoelectron spectroscopy analysis method.
    Type: Application
    Filed: March 14, 2019
    Publication date: June 4, 2020
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Sachiko KOIKE, Yuki UEDA, Keiichi TSUDA
  • Publication number: 20200114431
    Abstract: A surface-coated cutting tool includes a substrate and a coating film that coats the substrate, wherein the coating film includes a WC1-x layer composed of a compound represented by WC1-x, where x is more than or equal to 0.54 and less than or equal to 0.58, and the compound represented by WC1-x includes a hexagonal crystal structure.
    Type: Application
    Filed: March 14, 2019
    Publication date: April 16, 2020
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Sachiko KOIKE, Yuki UEDA, Keiichi TSUDA
  • Patent number: 10603721
    Abstract: A hard alloy includes complex carbonitride hard phases that contain Ti and at least one additional element, and a metal binder phase containing an iron group element as a main component element. The complex carbonitride hard phases include homogeneous composition hard phases where in-complex carbonitride hard phase average concentrations of Ti and the additional element have a difference of greater than or equal to ?5 atom % and less than or equal to 5 atom % from average concentrations of Ti and the additional element in all the complex carbonitride hard phases. On any cross section specified in the hard alloy, a cross-sectional area of the homogeneous composition hard phases accounts for greater than or equal to 80% of a cross-sectional area of the complex carbonitride hard phases, and the homogeneous composition hard phases account for greater than or equal to 80% of the complex carbonitride hard phases in number.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: March 31, 2020
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Masato Michiuchi, Keiichi Tsuda, Yoshihiro Minato
  • Patent number: 10519067
    Abstract: A cemented carbide including a hard phase, a binding phase, and inevitable impurities. The hard phase satisfies a first hard phase composed mainly of tungsten carbide, and a second hard phase composed mainly of a compound. The compound contains multiple types of metallic elements including tungsten and at least one element selected from carbon, nitrogen, oxygen, and boron. The second hard phase satisfies D10/D90<0.4, wherein D10 denotes a cumulative 10% grain size in an area-based grain size distribution on a surface or cross section of the cemented carbide, and D90 denotes a cumulative 90% grain size in the area-based grain size distribution, and satisfies ?2<5.0, wherein ?2 denotes the variance of the distance between the centroids of the nearest two of the second hard phases. The average grain size DW of the first hard phase ranges from 0.8 to 4.0 ?m and satisfies DM/DW<1.0, wherein DM denotes the average grain size of the second hard phase.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: December 31, 2019
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yasuki Kido, Michiko Matsukawa, Keiichi Tsuda
  • Publication number: 20190292649
    Abstract: At least one layer in a coating located on a surface of a substrate is a domain structure layer constituted of two or more domains different in composition and a thin layer located between the domains and being different in composition from each of the domains. The thin layer is located between any one domain and any another domain and in contact therewith. When the size of each of a plurality of first domains present in the domain structure layer is defined as a diameter of a virtual circumcircle in contact with each first domain, the average value of the size of each first domain is not smaller than 1 nm and not greater than 10 nm and a thickness of the thin layer in a direction of thickness of the domain structure layer is not less than 1 atomic layer and not more than 10 atomic layers.
    Type: Application
    Filed: December 28, 2016
    Publication date: September 26, 2019
    Applicants: Sumitomo Electric Industries, Ltd., MIMSI MATERIALS AB
    Inventors: Yoshiharu Utsumi, Paer Christoffer Arumskog, Keiichi Tsuda, Konstantinos Sarakinos, Sankara Pillay, Daniel Gunnar Magnfaelt
  • Patent number: 10383549
    Abstract: An intraoral three-dimensional measuring method, comprising: acquiring, with a handy scanner, wide range three-dimensional measurement information on a three-dimensional shape measured on a wide range in a desirable measurement range in an intraoral space; acquiring, with the handy scanner, a plurality of pieces of narrow range three-dimensional measurement information each on a three-dimensional shape measured on a narrow range narrower than the wide range in the measurement range; and locating, with a controller, the plurality of pieces of narrow range three-dimensional measurement information based on the wide range three-dimensional measurement information by use of, as a synthesis reference, intra-measurement range position information common to the wide range three-dimensional measurement information and each of the plurality of pieces of narrow range three-dimensional measurement information, and creating synthetic three-dimensional information on the measurement range.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: August 20, 2019
    Assignee: J. MORITA MFG. CORP.
    Inventors: Keisuke Sorimoto, Mikinori Nishimura, Tsuyoshi Tanaka, Masayuki Sano, Keiichi Tsuda, Ryosuke Kaji
  • Publication number: 20190092638
    Abstract: A complex carbonitride powder contains Ti as a main component element and at least one additional element selected from the group consisting of Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al, and Si. The complex carbonitride powder includes a plurality of complex carbonitride particles containing Ti and the additional element. The plurality of complex carbonitride particles include a plurality of homogeneous composition particles where average concentrations of Ti and the additional element in each complex carbonitride particle have a difference in a range of greater than or equal to ?5 atom % and less than or equal to 5 atom % from average concentrations of Ti and the additional element in the whole complex carbonitride powder. A cross-sectional area of the homogeneous composition particles is greater than or equal to 90% of a cross-sectional area of the complex carbonitride particles 1p.
    Type: Application
    Filed: October 21, 2016
    Publication date: March 28, 2019
    Applicants: Sumitomo Electric Industries, Ltd., A.L.M.T. Corp.
    Inventors: Masato Michiuchi, Keiichi Tsuda, Yoshihiro Minato, Tomoyuki Ishida, Akihide Matsumoto, Takehiko Hayashi
  • Publication number: 20180325425
    Abstract: An intraoral three-dimensional measuring method, comprising: acquiring, with a handy scanner, wide range three-dimensional measurement information on a three-dimensional shape measured on a wide range in a desirable measurement range in an intraoral space; acquiring, with the handy scanner, a plurality of pieces of narrow range three-dimensional measurement information each on a three-dimensional shape measured on a narrow range narrower than the wide range in the measurement range; and locating, with a controller, the plurality of pieces of narrow range three-dimensional measurement information based on the wide range three-dimensional measurement information by use of, as a synthesis reference, intra-measurement range position information common to the wide range three-dimensional measurement information and each of the plurality of pieces of narrow range three-dimensional measurement information, and creating synthetic three-dimensional information on the measurement range.
    Type: Application
    Filed: June 27, 2018
    Publication date: November 15, 2018
    Applicant: J. MORITA MFG. CORP.
    Inventors: Keisuke SORIMOTO, Mikinori NISHIMURA, Tsuyoshi TANAKA, Masayuki SANO, Keiichi TSUDA, Ryosuke KAJI
  • Publication number: 20180222804
    Abstract: A cemented carbide including a hard phase, a binding phase, and inevitable impurities. The hard phase satisfies a first hard phase composed mainly of tungsten carbide, and a second hard phase composed mainly of a compound. The compound contains multiple types of metallic elements including tungsten and at least one element selected from carbon, nitrogen, oxygen, and boron. The second hard phase satisfies D10/D90<0.4, wherein D10 denotes a cumulative 10% grain size in an area-based grain size distribution on a surface or cross section of the cemented carbide, and D90 denotes a cumulative 90% grain size in the area-based grain size distribution, and satisfies ?2<5.0, wherein ?2 denotes the variance of the distance between the centroids of the nearest two of the second hard phases. The average grain size DW of the first hard phase ranges from 0.8 to 4.0 ?m and satisfies DM/DW<1.0, wherein DM denotes the average grain size of the second hard phase.
    Type: Application
    Filed: April 13, 2017
    Publication date: August 9, 2018
    Inventors: Yasuki Kido, Michiko Matsukawa, Keiichi Tsuda
  • Patent number: 10039475
    Abstract: An intraoral three-dimensional measuring method, comprising: acquiring, with a handy scanner, wide range three-dimensional measurement information on a three-dimensional shape measured on a wide range in a desirable measurement range in an intraoral space; acquiring, with the handy scanner, a plurality of pieces of narrow range three-dimensional measurement information each on a three-dimensional shape measured on a narrow range narrower than the wide range in the measurement range; and locating, with a controller, the plurality of pieces of narrow range three-dimensional measurement information based on the wide range three-dimensional measurement information by use of, as a synthesis reference, intra-measurement range position information common to the wide range three-dimensional measurement information and each of the plurality of pieces of narrow range three-dimensional measurement information, and creating synthetic three-dimensional information on the measurement range.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: August 7, 2018
    Assignee: J. MORTIA MFG. CORP.
    Inventors: Keisuke Sorimoto, Mikinori Nishimura, Tsuyoshi Tanaka, Masayuki Sano, Keiichi Tsuda, Ryosuke Kaji
  • Publication number: 20180195161
    Abstract: At least one layer in a coating located on a surface of a substrate is a domain structure layer constituted of two or more domains different in composition. The average value of the size of each of first domains, defined as the diameter of a virtual circumcircle in contact with each first domain, is 1 nm to 10 nm. The average value of the nearest neighbor distance of each first domain, defined as the length of the shortest straight line connecting the center of the circumcircle with the center of another circumcircle adjacent to the circumcircle, is 1 nm to 12 nm. 95% or more of the first domains has a size within ±25% of the average value of the size, and 95% or more of the first domains has a nearest neighbor distance within ±25% of the average value of the nearest neighbor distance.
    Type: Application
    Filed: July 6, 2016
    Publication date: July 12, 2018
    Inventors: Yoshiharu Utsumi, Paer Christoffer Arumskog, Keiichi Tsuda, Konstantinos Sarakinos, Daniel Gunnar Magnfaelt