Patents by Inventor Ryu Hirayama

Ryu Hirayama 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: 11973369
    Abstract: A laminated core includes a plurality of electrical steel sheets stacked on each other, wherein, among the plurality of electrical steel sheets, both of the electrical steel sheets located on a first side in a stacking direction and the electrical steel sheets located on a second side in the stacking direction are fastened to each other but are not adhered to each other, and the electrical steel sheets located in a center in the stacking direction are adhered to each other but are not fastened to each other.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: April 30, 2024
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hiroshi Fujimura, Takeaki Wakisaka, Ryu Hirayama
  • Patent number: 11923130
    Abstract: A laminated core includes: a plurality of electrical steel sheets stacked in a thickness direction, wherein the electrical steel sheet includes an annular core back part and a plurality of tooth parts protruding from the core back part toward a radial direction and arranged at intervals in a circumferential direction of the core back part, and wherein among the plurality of electrical steel sheets, the tooth parts of the electrical steel sheets located at one side on the outside in a stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, the tooth parts of the electrical steel sheets located at the other side on the outside in the stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, and the tooth parts of the electrical steel sheets located at a center part in the stacking direction are not adhered to each other.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: March 5, 2024
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Masahito Kamikawabata, Ryu Hirayama, Kazutoshi Takeda
  • Patent number: 11915860
    Abstract: A laminated core includes a plurality of electrical steel sheets stacked on each other and coated with an insulation coating on both surfaces thereof, and an adhesion part provided between the electrical steel sheets adjacent to each other in a stacking direction and configured to adhere the electrical steel sheets to each other, wherein an adhesion area ratio of the electrical steel sheet by the adhesion part is 1% or more and 40% or less.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: February 27, 2024
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Ryu Hirayama, Kazutoshi Takeda
  • Patent number: 11863017
    Abstract: A laminated core includes a plurality of electrical steel sheets stacked on each other, and an adhesion part provided between electrical steel sheets adjacent to each other in a stacking direction and configured to adhere the electrical steel sheets to each other, wherein the adhesion part partially adheres the electrical steel sheets adjacent to each other in the stacking direction, and the adhesion parts adjacent to each other in the stacking direction have different arrangement regions in a plan view seen in the stacking direction.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: January 2, 2024
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Masahito Kamikawabata, Ryu Hirayama, Kazutoshi Takeda
  • Publication number: 20230253140
    Abstract: This adhesively-laminated core manufacturing method is a method for manufacturing an adhesively-laminated core by punching a plurality of steel sheet parts while a strip-shaped steel sheet is fed and laminating the steel sheet parts via an adhesive, and includes a step of forming a curing acceleration portion by applying and drying a curing accelerator on one or both surfaces of the strip-shaped steel sheet before a pressing oil is applied, and a step of applying the pressing oil to a surface of the curing acceleration portion.
    Type: Application
    Filed: July 6, 2021
    Publication date: August 10, 2023
    Applicants: NIPPON STEEL CORPORATION, TOAGOSEI CO., LTD.
    Inventors: Kazutoshi TAKEDA, Shinsuke TAKATANI, Ryu HIRAYAMA, Yoshiaki IWASE, Makoto NIWA, Masashi YAMADA
  • Patent number: 11710990
    Abstract: A laminated core includes a plurality of electrical steel sheets stacked in a thickness direction, the electrical steel sheet includes an annular core back part and a plurality of tooth parts that protrude from the core back part in a radial direction and are disposed at intervals in a circumferential direction of the core back part, a fastening part is provided in a portion of the core back part corresponding to the tooth part, and an adhesion part is provided in the tooth part.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: July 25, 2023
    Assignee: Nippon Steel Corporation
    Inventors: Yasuo Ohsugi, Ryu Hirayama, Kazutoshi Takeda
  • Publication number: 20220384085
    Abstract: A laminated core (100) has a plurality of legs having an extension direction in a direction perpendicular to a lamination direction of electrical steel sheets and a plurality of yokes having an extension direction in a direction orthogonal to the lamination direction of the electrical steel sheets and the extension direction of the legs, and, in the same position of the electrical steel sheet in the lamination direction, at least a partial region of the legs and at least a partial region of the yokes are configured by the same electrical steel sheet. The electrical steel sheet is disposed such that a first direction of directions of easy magnetization of the electrical steel sheet is along the extension direction of the legs and a second direction of the directions of easy magnetization of the electrical steel sheet is along the extension direction of the yokes.
    Type: Application
    Filed: November 13, 2020
    Publication date: December 1, 2022
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Ryu HIRAYAMA, Tesshu MURAKAWA, Miho TOMITA
  • Publication number: 20220351890
    Abstract: A wound core equipped with a laminated body including plural electrical steel sheets stacked in a ring shape in side view. The laminated body includes plural bent portions, and plural block-shaped portions at positions between adjacent bent portions. At least one block-shaped portion among the plural block-shaped portions includes a heat transmission path bordered by the electrical steel sheets at least at a portion between the stacked electrical steel sheets. The heat transmission path is included only at the at least one block-shaped portion.
    Type: Application
    Filed: September 3, 2020
    Publication date: November 3, 2022
    Inventors: Hisashi MOGI, Takahito MIZUMURA, Teruyuki TAMAKI, Hiroshi FUJIMURA, Ryu HIRAYAMA
  • Publication number: 20220285074
    Abstract: A wound core equipped with a laminated body including plural electrical steel sheets stacked in a ring shape in side view. The laminated body includes plural bent portions, and plural block-shaped portions at positions between adjacent bent portions. At least one bent portion among the plural bent portions is a high stacking factor bent portion, wherein a stacking factor of the electrical steel sheets at the high stacking bent portion is higher than an average stacking factor of the steel sheets at the plural block-shaped portions.
    Type: Application
    Filed: September 3, 2020
    Publication date: September 8, 2022
    Inventors: Hisashi MOGI, Takahito MIZUMURA, Teruyuki TAMAKI, Hiroshi FUJIMURA, Ryu HIRAYAMA
  • Publication number: 20220209592
    Abstract: What is disclosed is a core block, a plurality thereof constituting a laminated core by being connected in an annular shape, the core block including: a plurality of electrical steel sheet pieces stacked to each other; and an adhesion part which is provided between the electrical steel sheet pieces adjacent in a stacking direction and adheres the electrical steel sheet pieces to each other, in which an adhesion area ratio of the electrical steel sheet piece by the adhesion part is 1% or more and 60% or less.
    Type: Application
    Filed: June 22, 2020
    Publication date: June 30, 2022
    Inventors: Ryu HIRAYAMA, Kazutoshi TAKEDA
  • Publication number: 20220094218
    Abstract: A laminated core includes a plurality of electrical steel sheets stacked in a thickness direction, each of the electrical steel sheets includes an annular core back part; a plurality of fastening parts are provided in the core back part at intervals in a circumferential direction; an adhesion region is formed on an outer circumferential side from the fastening parts in the core back part; and a non-adhesion region is formed on an inner circumferential side from the fastening parts in the core back part.
    Type: Application
    Filed: December 17, 2019
    Publication date: March 24, 2022
    Inventors: Yasuo OHSUGI, Ryu HIRAYAMA, Kazutoshi TAKEDA
  • Publication number: 20220069640
    Abstract: A laminated core includes a plurality of electrical steel sheets stacked in a thickness direction, the electrical steel sheet includes an annular core back part and a plurality of tooth parts that protrude from the core back part in a radial direction and are disposed at intervals in a circumferential direction of the core back part, a fastening part is provided in a portion of the core back part corresponding to the tooth part, and an adhesion part is provided in the tooth part.
    Type: Application
    Filed: December 17, 2019
    Publication date: March 3, 2022
    Inventors: Yasuo OHSUGI, Ryu HIRAYAMA, Kazutoshi TAKEDA
  • Publication number: 20220028607
    Abstract: A laminated core includes a plurality of electrical steel sheets stacked on each other, and an adhesion part which is provided between the electrical steel sheets adjacent to each other in a stacking direction and adheres the electrical steel sheets to each other, in which the electrical steel sheet include an annular core back part, and a plurality of tooth parts which extend from the core back part in a radial direction of the core back part and are disposed at intervals in a circumferential direction of the core back part, an adhesion region in which the adhesion part is provided is formed in the core back part of the electrical steel sheet, and the adhesion region extends in a direction along a magnetic flux passing through a region of the electrical steel sheet in contact with the adhesion region.
    Type: Application
    Filed: December 17, 2019
    Publication date: January 27, 2022
    Inventors: Ryu HIRAYAMA, Kazutoshi TAKEDA
  • Publication number: 20220028608
    Abstract: A laminated core includes: a plurality of electrical steel sheets stacked in a thickness direction, wherein the electrical steel sheet includes an annular core back part and a plurality of tooth parts protruding from the core back part toward a radial direction and arranged at intervals in a circumferential direction of the core back part, and wherein among the plurality of electrical steel sheets, the tooth parts of the electrical steel sheets located at one side on the outside in a stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, the tooth parts of the electrical steel sheets located at the other side on the outside in the stacking direction are adhered to each other by an adhesion part provided between the tooth parts adjacent to each other in the stacking direction, and the tooth parts of the electrical steel sheets located at a center part in the stacking direction are not adhered to each other.
    Type: Application
    Filed: December 17, 2019
    Publication date: January 27, 2022
    Inventors: Masahito KAMIKAWABATA, Ryu HIRAYAMA, Kazutoshi TAKEDA
  • Publication number: 20220020530
    Abstract: A laminated core includes a plurality of electrical steel sheets stacked on each other and coated with an insulation coating on both surfaces thereof, and an adhesion part provided between the electrical steel sheets adjacent to each other in a stacking direction and configured to adhere the electrical steel sheets to each other, wherein an adhesion area ratio of the electrical steel sheet by the adhesion part is 1% or more and 40% or less.
    Type: Application
    Filed: December 17, 2019
    Publication date: January 20, 2022
    Inventors: Ryu HIRAYAMA, Kazutoshi TAKEDA
  • Publication number: 20220020521
    Abstract: Provided is an adhesively-laminated core for a stator including: a plurality of electrical steel sheets which have phosphate-based insulation coatings on surfaces thereof and are overlapped coaxially with each other; and adhesion parts provided between the respective electrical steel sheets, an average thickness of the insulation coatings is 0.3 ?m to 1.2 ?m, an average thickness of the adhesion parts is 1.0 ?m to 3.0 ?m, and in a case where the average thickness of the insulation coating is defined as t1 in a unit of ?m, and the average thickness of the adhesion parts is defined as t2 in a unit of ?m, the following Equation 1 is satisfied. ?4.3×t1+3.6?t2??4.3×t1+6.
    Type: Application
    Filed: December 17, 2019
    Publication date: January 20, 2022
    Inventors: Kazutoshi TAKEDA, Ryu HIRAYAMA
  • Publication number: 20220014051
    Abstract: A laminated core including a plurality of electrical steel sheets stacked on each other, and adhesion parts which are provided between the electrical steel sheets adjacent to each other in an axial direction thereof and adhering the electrical steel sheets to each other, in which each of the electrical steel sheets includes an annular core back part, and a plurality of tooth parts which extend from the core back part in a radial direction of the core back part and are disposed at intervals in a circumferential direction of the core back part, and each of the tooth parts of the electrical steel sheets has an adhesion region provided with the adhesion part having a belt shape extending in the circumferential direction.
    Type: Application
    Filed: December 17, 2019
    Publication date: January 13, 2022
    Inventors: Ryu HIRAYAMA, Kazutoshi TAKEDA
  • Publication number: 20220014053
    Abstract: In an adhesively-laminated core for a stator, a chemical component of each of electrical steel sheets includes 2.5% to 3.9% by mass of Si, an average tensile modulus of elasticity of each of adhesion parts is 2500 MPa to 5000 MPa, and when an average sheet thickness of the each of electrical steel sheets is t1 in units of mm, an average thickness of the each of adhesion parts is t2 in units of ?m, and an average value of yield strengths of the each of electrical steel sheets is YP in units of MPa, a condition A of satisfying the following expressions 1, 2, and 3 or a condition B of satisfying the following expressions 3, 4, and 5 or combination thereof is satisfied. 50×t1?12?t2?50×t1?6 ??(expression 1) 0.15?t1?0.27 ??(expression 2) 0.5?t2?2.5 ??(expression 3) 0.025×YP?12?t2?0.
    Type: Application
    Filed: December 17, 2019
    Publication date: January 13, 2022
    Inventors: Kazutoshi TAKEDA, Ryu HIRAYAMA
  • Publication number: 20220014052
    Abstract: A laminated core includes a plurality of electrical steel sheets stacked on each other, and an adhesion part provided between electrical steel sheets adjacent to each other in a stacking direction and configured to adhere the electrical steel sheets to each other, wherein the adhesion part partially adheres the electrical steel sheets adjacent to each other in the stacking direction, and the adhesion parts adjacent to each other in the stacking direction have different arrangement regions in a plan view seen in the stacking direction.
    Type: Application
    Filed: December 17, 2019
    Publication date: January 13, 2022
    Inventors: Masahito KAMIKAWABATA, Ryu HIRAYAMA, Kazutoshi TAKEDA
  • Publication number: 20220006334
    Abstract: A laminated core includes a plurality of electrical steel sheets that are stacked on one another. All sets of the electrical steel sheets adjacent to each other in a stacking direction are fixed to each other in the laminated core. Some sets of electrical steel sheets among all sets of the electrical steel sheets are fastened but not adhered to each other, and the remaining sets of electrical steel sheets are adhered but not fastened to each other.
    Type: Application
    Filed: December 17, 2019
    Publication date: January 6, 2022
    Inventors: Takeaki WAKISAKA, Hiroshi FUJIMURA, Ryu HIRAYAMA