Patents by Inventor Kouki Tomimura

Kouki Tomimura 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: 11268559
    Abstract: A fastening member for fastening two or more components, ensuring a high degree of freedom in terms of fastening positions and objects, reducing the number of holes, preventing the rotation of the components and the fastening member in one-point fastening, and maintaining high strength and resistance against vibration after fastening. Specifically, a fastening structure for fastening the first and second components, which comprises a first component, a pin that has non-helical grooves running in a circumferential direction and aligned along a longitudinal direction and whose one end in the longitudinal direction is bonded to the first component, a second component that has an insertion hole for inserting the pin, and a collar that is fitted around and bonded to the pin so that the second component is positioned between the collar and the first component, wherein said second component is prevented from rotating with respect to said pin.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: March 8, 2022
    Assignee: NIPPON STEEL NISSHIN CO., LTD.
    Inventors: Akiyoshi Hikosaka, Kouki Tomimura
  • Patent number: 11224909
    Abstract: Provided are a protrusion forming device, a protrusion forming method, and a formed article, with which a height equal to or greater than the plate thickness is possible, the edges are sharp, and cracking can be prevented. This protrusion forming device is characterized by being equipped with a die unit provided with a die hole, and a punch unit having a large punch part with a size such that this part cannot be inserted into the die hole, and a small punch part that protrudes from the large punch part toward the die unit and can be inserted into the die hole, and characterized in that the workpiece is deformed by pressing a portion of the workpiece arranged between the die unit and the punch unit toward the die unit by means of the punch unit, thereby forming a protrusion.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: January 18, 2022
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Shinnosuke Nishijima, Kouki Tomimura
  • Patent number: 11098827
    Abstract: A tubular structure includes a tube member provided with annular protrusions, on a side of an insertion opening that is a tube end part or a receiving opening and, on an outer circumference of the tube member, ring members, arranged on an opposite side of the tube end part with respect to the annular protrusions, having two side surfaces that are vertical with respect to an axis of the tube member.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: August 24, 2021
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Shinnosuke Nishijima, Kouki Tomimura
  • Patent number: 10807177
    Abstract: The present invention provides a method for MIG brazing an Al alloy to a steel sheet so as to manufacture a lap joint member that excels in bonding strength with respect to the Al alloy. With the MIG brazing method, a bonding target sheet, specifically, an Al sheet or an Al alloy sheet is bonded to a hot dip Zn-based alloy coated steel sheet (1) whose coating layer contains Al in an amount of 1.0% by mass to 22.0% by mass. A target location of MIG brazing is a region between (i) an intersection (C) of one end of an end surface (6) of the bonding target sheet and the hot dip Zn-based alloy coated steel sheet and (ii) the other end (U) of the end surface of the bonding target sheet.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: October 20, 2020
    Assignee: NIPPON STEEL NISSHIN CO., LTD.
    Inventors: Kazuaki Hosomi, Kouki Tomimura, Takefumi Nakako
  • Patent number: 10792746
    Abstract: The present invention provides a method for laser brazing an Al alloy to a steel sheet so as to produce a lap joint member that excels in bonding strength with respect to the Al alloy. The laser brazing method includes a brazing step of forming a brazed part (9) for bonding an Al alloy (3) to a hot dip Zn-based alloy coated steel sheet (1) in which a coating layer (2) contains 1.0 to 22.0% by mass of Al and a coating weight per surface is 15 to 250 g/m2.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: October 6, 2020
    Assignee: NIPPON STEEL NISSHIN CO., LTD.
    Inventors: Kazuaki Hosomi, Kouki Tomimura, Takefumi Nakako
  • Publication number: 20200055133
    Abstract: The present invention provides a method for MIG brazing an Al alloy to a steel sheet so as to manufacture a lap joint member that excels in bonding strength with respect to the Al alloy. With the MIG brazing method, a bonding target sheet, specifically, an Al sheet or an Al alloy sheet is bonded to a hot dip Zn-based alloy coated steel sheet (1) whose coating layer contains Al in an amount of 1.0% by mass to 22.0% by mass. A target location of MIG brazing is a region between (i) an intersection (C) of one end of an end surface (6) of the bonding target sheet and the hot dip Zn-based alloy coated steel sheet and (ii) the other end (U) of the end surface of the bonding target sheet.
    Type: Application
    Filed: February 21, 2018
    Publication date: February 20, 2020
    Inventors: Kazuaki Hosomi, Kouki Tomimura, Takefumi Nakako
  • Patent number: 10562084
    Abstract: Provided is a clad steel plate with excellent thermal conductivity that can be used suitably in cookware and the like. The present invention is a three-layer clad steel plate having a carbon steel base material and stainless steel mating material disposed respectively on both surface sides of the base material, wherein a plate thickness ratio L given by Equation (1) is 1.0-5.0 and at least one surface of the clad steel plate has a plurality of protrusions and recesses. Plate thickness ratio L=the plate thickness of the base material/the total thickness of the mating material . . . Equation (1) Here, the base material thickness and the mating material thickness are the thicknesses at the protrusions.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: February 18, 2020
    Assignee: NIPPON STEEL NISSHIN CO., LTD.
    Inventors: Masahito Sakaki, Kouki Tomimura
  • Publication number: 20200023453
    Abstract: The present invention provides a method for laser brazing an Al alloy to a steel sheet so as to produce a lap joint member that excels in bonding strength with respect to the Al alloy. The laser brazing method includes a brazing step of forming a brazed part (9) for bonding an Al alloy (3) to a hot dip Zn-based alloy coated steel sheet (1) in which a coating layer (2) contains 1.0 to 22.0% by mass of Al and a coating weight per surface is 15 to 250 g/m2.
    Type: Application
    Filed: February 21, 2018
    Publication date: January 23, 2020
    Inventors: Kazuaki Hosomi, Kouki Tomimura, Takefumi Nakako
  • Publication number: 20200018339
    Abstract: The present invention provides a fastening structure and a fastening method for fastening first and second components, ensuring a high degree of freedom in terms of bonding positions and objects, and reducing the number of holes in the components. Specifically, the present invention provides a fastening structure for fastening the first and second components, wherein said fastening structure comprises a pin that has non-helical grooves running in a circumferential direction and aligned along a longitudinal direction, and a collar that is fitted around said pin, and said pin is united with said first component by bonding one end of said pin in the longitudinal direction to said first component without forming a hole in said first component, and said second component has a hole for inserting said pin so that said collar is fitted around and swaged to said pin protruding through the hole.
    Type: Application
    Filed: January 31, 2018
    Publication date: January 16, 2020
    Inventors: AKIYOSHI HIKOSAKA, KOUKI TOMIMURA
  • Publication number: 20200018338
    Abstract: A fastening member for fastening two or more components, ensuring a high degree of freedom in terms of fastening positions and objects, reducing the number of holes, preventing the rotation of the components and the fastening member in one-point fastening, and maintaining high strength and resistance against vibration after fastening. Specifically, a fastening structure for fastening the first and second components, which comprises a first component, a pin that has non-helical grooves running in a circumferential direction and aligned along a longitudinal direction and whose one end in the longitudinal direction is bonded to the first component, a second component that has an insertion hole for inserting the pin, and a collar that is fitted around and bonded to the pin so that the second component is positioned between the collar and the first component, wherein said second component is prevented from rotating with respect to said pin.
    Type: Application
    Filed: January 31, 2018
    Publication date: January 16, 2020
    Inventors: AKIYOSHI HIKOSAKA, KOUKI TOMIMURA
  • Publication number: 20190078710
    Abstract: Provided is a tubular structure that, even when clearance between a housing and the tubular structure is large, can prevent tube removal and that is capable of absorbing a certain amount of vibration in a lengthwise direction and a manufacturing method therefor. The present invention is a tubular structure comprising a tube member provided with annular protrusions, on a side of an insertion opening that is a tube end part or a receiving opening and, on the outer circumference of the ring member, ring members, arranged on an opposite side of the tube end part with respect to the annular protrusions, having two side surfaces that are vertical with respect to an axis A of the tube member.
    Type: Application
    Filed: January 29, 2016
    Publication date: March 14, 2019
    Inventors: Shinnosuke NISHIJIMA, Kouki TOMIMURA
  • Patent number: 10124386
    Abstract: A form-rolling device for processing a tubular member may include a shaft rotatable around a first axis, a first grooving portion that protrudes from an outer circumference of the shaft; a second grooving portion that is rotatable around a second axis parallel to the first axis; a flange-shaped tube-end positioning member that is attached to a position of the outer circumference of the shaft nearer to a base end than the first grooving portion, and a supporting member that supports an outer circumference of a ring member held on an outer circumference of the tubular member.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: November 13, 2018
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Shinnosuke Nishijima, Kouki Tomimura
  • Publication number: 20180304326
    Abstract: Provided is a clad steel plate with excellent thermal conductivity that can be used suitably in cookware and the like. The present invention is a three-layer clad steel plate having a carbon steel base material and stainless steel mating material disposed respectively on both surface sides of the base material, wherein a plate thickness ratio L given by Equation (1) is 1.0-5.0 and at least one surface of the clad steel plate has a plurality of protrusions and recesses. Plate thickness ratio L=the plate thickness of the base material/the total thickness of the mating material . . . Equation (1) Here, the base material thickness and the mating material thickness are the thicknesses at the protrusions.
    Type: Application
    Filed: October 14, 2016
    Publication date: October 25, 2018
    Inventors: Masahito SAKAKI, Kouki TOMIMURA
  • Publication number: 20180200773
    Abstract: Provided are a protrusion forming device, a protrusion forming method, and a formed article, with which a height equal to or greater than the plate thickness is possible, the edges are sharp, and cracking can be prevented. This protrusion forming device is characterized by being equipped with a die unit provided with a die hole, and a punch unit having a large punch part with a size such that this part cannot be inserted into the die hole, and a small punch part that protrudes from the large punch part toward the die unit and can be inserted into the die hole, and characterized in that the workpiece is deformed by pressing a portion of the workpiece arranged between the die unit and the punch unit toward the die unit by means of the punch unit, thereby forming a protrusion.
    Type: Application
    Filed: June 29, 2016
    Publication date: July 19, 2018
    Inventors: Shinnosuke NISHIJIMA, Kouki TOMIMURA
  • Publication number: 20180065163
    Abstract: A form-rolling device for processing a tubular member may include a shaft rotatable around a first axis, a first grooving portion that protrudes from an outer circumference of the shaft; a second grooving portion that is rotatable around a second axis parallel to the first axis; a flange-shaped tube-end positioning member that is attached to a position of the outer circumference of the shaft nearer to a base end than the first grooving portion, and a supporting member that supports an outer circumference of a ring member held on an outer circumference of the tubular member.
    Type: Application
    Filed: March 9, 2016
    Publication date: March 8, 2018
    Inventors: Shinnosuke NISHIJIMA, Kouki TOMIMURA
  • Patent number: 9623467
    Abstract: Provided is a method of forming a locking ridge for a case of forming the locking ridge on an outer peripheral surface of a joint portion by form rolling, the method realizing a joint portion structure which is superior in pipe detachment prevention performance when pipes with locking ridges are connected by fixing pipe ends with a housing. Using a convex roller arranged inside the workpiece pipe body and a forming circular groove arranged outside the pipe body, the locking ridge is form-rolled such that an upright wall portion thereof is raised at an angle of at least 65° and no greater than 90° with respect to the outer peripheral surface in the pipe axis direction, and that a height of the locking ridge from the outer peripheral surface to the apex of the tip portion is at least a total of curvature radii of faces of the processing means in contact with the pipe body.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: April 18, 2017
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Shinnosuke Nishijima, Katsuhide Nishio, Akihiro Ando, Kouki Tomimura
  • Publication number: 20160288187
    Abstract: Provided is a method of forming a locking ridge for a case of forming the locking ridge on an outer peripheral surface of a joint portion by form rolling, the method realizing a joint portion structure which is superior in pipe detachment prevention performance when pipes with locking ridges are connected by fixing pipe ends with a housing. Using a convex roller arranged inside the workpiece pipe body and a forming circular groove arranged outside the pipe body, the locking ridge is form-rolled such that an upright wall portion thereof is raised at an angle of at least 65° and no greater than 90° with respect to the outer peripheral surface in the pipe axis direction, and that a height of the locking ridge from the outer peripheral surface to the apex of the tip portion is at least a total of curvature radii of faces of the processing means in contact with the pipe body.
    Type: Application
    Filed: November 17, 2014
    Publication date: October 6, 2016
    Inventors: Shinnosuke NISHIJIMA, Katsuhide NISHIO, Akihiro ANDO, Kouki TOMIMURA
  • Patent number: 9249475
    Abstract: A ferritic stainless steel suited for use as a member for heat exchangers to be brazed with Ni-based filler metal or Cu-based filler metal, comprising, on the basis of mass percent, C: 0.03% or less, Si: 3% or less, Mn: 2% or less, P: 0.05% or less, S: 0.03% or less, Cr: from 11 to 30%, Nb: from 0.15 to 0.8%, and N: 0.03% or less, wherein the balance is composed of Fe and incidental impurities, and wherein a value A determined by the following equation is 0.10 or greater: A=Nb?(C×92.9/12+N×92.9/14).
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: February 2, 2016
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Akinori Kawano, Taichirou Mizoguchi, Kouki Tomimura, Wakahiro Harada
  • Publication number: 20120193328
    Abstract: Disclosed is a ferritic stainless steel for hot-water tanks with welded structure, comprising, in terms of % by mass, at most 0.02% of C, from 0.01 to 0.30% of Si, at most 1% of Mn, at most 0.04% of P, at most 0.03% of S, from more than 21 to 26% of Cr, at most 2% of Mo, from 0.05 to 0.6% of Nb, from 0.05 to 0.4% of Ti, at most 0.025% of N, and from 0.02 to 0.3% of Al, and optionally containing at least one of at most 2%, preferably from 0.1 to 2% of Ni and at most 1%, preferably from 0.1 to 1% of Cu, with a balance of Fe and inevitable impurities.
    Type: Application
    Filed: March 30, 2012
    Publication date: August 2, 2012
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Toshiro ADACHI, Akihiro NONOMURA, Osamu YAMAMOTO, Kouki TOMIMURA
  • Publication number: 20110033731
    Abstract: A ferritic stainless steel suited for use as a member for heat exchangers to be brazed with Ni-based filler metal or Cu-based filler metal, comprising, on the basis of mass percent, C: 0.03% or less, Si: 3% or less, Mn: 2% or less, P: 0.05% or less, S: 0.03% or less, Cr: from 11 to 30%, Nb: from 0.15 to 0.8%, and N: 0.03% or less, wherein the balance is composed of Fe and incidental impurities, and wherein a value A determined by the following equation is 0.10 or greater: A=Nb?(C×92.9/12+N×92.9/14).
    Type: Application
    Filed: May 11, 2009
    Publication date: February 10, 2011
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Akinori Kawano, Taichirou Mizoguchi, Kouki Tomimura, Wakahiro Harada