Patents by Inventor Kosuke Yamanaka

Kosuke Yamanaka 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: 20210213561
    Abstract: The present invention is characterized by including a heat medium pipe insertion process to insert a heat medium pipe into a concave groove; a lid plate insertion process to insert a lid plate into a lid groove; and a joining process to perform friction stirring while a primary joining rotary tool provided with a base side pin and a tip side pin is moved along a butted portion of a side wall of the lid groove and a side face of the lid plate, wherein in the joining process, friction stirring is performed while the tip side pin of the primary rotary tool which is rotating is inserted into the butted portion and an outer circumferential face of the base side pin is in contact with the base member and the lid plate, and plastically fluidized material fluidized by frictional heat is flowed into a void portion formed adjacent to the heat medium pipe.
    Type: Application
    Filed: May 7, 2019
    Publication date: July 15, 2021
    Applicant: NIPPON LIGHT METAL COMPANY, LTD.
    Inventors: Hisashi HORI, Nobushiro SEO, Kosuke YAMANAKA
  • Publication number: 20210146473
    Abstract: Provided is a method for manufacturing a liquid-cooled jacket, to reduce the size of a recessed groove on a surface of a metal member and also to reduce roughness of an abutted surface. The method includes: a placing step of placing a jacket body and a sealing body, a first main joining step of performing friction stirring by moving a main joining rotary tool around along a first abutted portion, and a second main joining step of performing friction stirring by moving the main joining rotary tool around along a second abutted portion. The main joining rotary tool has a base-end-side pin and a tip-end-side pin. A taper angle of the base-end-side pin is grater than a taper angle of the tip-end-side pin and a stairs-like pin step portion is formed on an outer circumferential surface of the tip-end-side pin.
    Type: Application
    Filed: July 20, 2018
    Publication date: May 20, 2021
    Applicant: NIPPON LIGHT METAL COMPANY, LTD.
    Inventors: Hisashi HORI, Nobushiro SEO, Kosuke YAMANAKA
  • Publication number: 20210146472
    Abstract: A first metal member (1) and a second metal member (2) are joined together using a rotary tool (F1D) comprising a base side pin (F3) and a tip side pin (F4), comprising an overlapping and abutting process of forming an overlapped portion (J1a), a top side abutted portion (J1b) and a back side abutted portion (J1c), and a friction stirring process of inserting the tip side pin (F4) that is rotating into the top side abutted portion (J1b) to join the top side abutted portion (J1b) and the overlapped portion (J1a) with a flat face (F5) vertical to a rotation axis of the rotary tool (F1D) being in contact with both the first metal member (1) and the second metal member (2) and with a tip face (f7) of a protruding portion (F6) protruding from the flat face (F5) being inserted deep over the overlapped portion (J1a).
    Type: Application
    Filed: January 25, 2018
    Publication date: May 20, 2021
    Applicant: NIPPON LIGHT METAL COMPANY, LTD.
    Inventors: Hisashi HORI, Kosuke YAMANAKA
  • Publication number: 20210053144
    Abstract: A liquid cooling jacket is produced by forming a first butted portion where a step side face of a peripheral wall portion and an outer peripheral side face of a sealing body butt each other and a third butted portion where a step side face of a support pillar portion and a hole wall of the hole portion of the sealing body portion butt each other with a gap, and friction-stirring by inserting a tip side pin and a base side pin of a primary joining rotary tool that is rotating into the sealing body and moving the primary joining rotary tool along the third butted portion with an outer circumferential face of the tip side pin being kept off the step side face while having a second aluminum alloy of the sealing body flow into the gap.
    Type: Application
    Filed: September 27, 2018
    Publication date: February 25, 2021
    Applicant: NIPPON LIGHT METAL COMPANY, LTD.
    Inventors: Hisashi HORI, Nobushiro SEO, Kosuke YAMANAKA
  • Publication number: 20200359523
    Abstract: A method for manufacturing a liquid-cooling jacket (1) where heat transfer fluid flows in a hollow part (14) defined by a jacket body (2) and a sealing body (3) includes: an overlapping process in which the sealing body (3) is placed on an end surface (11a) of a peripheral wall part (11) in such a way that the end surface (11a) and a back surface of the sealing body (3) are overlapped each other to form a first overlapped part (H1); and a primary joining process in which primary joining is performed by friction stirring in such a way that a rotary tool (F1) is moved once around a recessed part (13) along the first overlapped part (H1). In the primary joining process, the first overlapped part (H1) is joined in a state where the tip side pin is in contact with only the sealing body (3) or with the jacket body (2) and the sealing body (3) while the base side pin is in contact with the sealing body (3).
    Type: Application
    Filed: May 16, 2018
    Publication date: November 12, 2020
    Applicant: NIPPON LIGHT METAL COMPANY, LTD.
    Inventors: Hisashi HORI, Nobushiro SEO, Kosuke YAMANAKA
  • Publication number: 20200353558
    Abstract: Provided is a method for manufacturing a liquid cooling jacket including a jacket body and a sealing body joined to the jacket body. The method includes steps of: preparing; placing; first primary joining with a rotary tool; and second primary joining with the rotary tool. A rotary tool includes a base end pin and a distal end pin. The distal end pin includes a flat surface and a protrusion extending from the flat surface. In the first primary joining and the second primary joining, friction stirring is performed in a state where a front surface of the sealing body is brought in contact with an outer peripheral surface of the base end pin, the sealing body is brought in contact with the flat surface of the distal end pin, and the jacket body is brought in contact with the protrusion.
    Type: Application
    Filed: August 1, 2018
    Publication date: November 12, 2020
    Applicant: NIPPON LIGHT METAL COMPANY, LTD.
    Inventors: Hisashi HORI, Nobushiro SEO, Kosuke YAMANAKA
  • Publication number: 20200353557
    Abstract: A method for manufacturing a liquid-cooling jacket (1) where heat transfer fluid flows in a hollow part (14) defined by a jacket body (2) and a sealing body (3) includes: an overlapping process in which the sealing body (3) is placed on an end surface (11a) of a peripheral wall part (11) in such a way that the end surface (11a) and a back surface of the sealing body (3) are overlapped each other to form a first overlapped part (H1); and a primary joining process in which primary joining is performed by friction stirring in such a way that a rotary tool (FD) is moved once around a recessed part (13) along the first overlapped part (H1).
    Type: Application
    Filed: May 16, 2018
    Publication date: November 12, 2020
    Applicant: NIPPON LIGHT METAL COMPANY, LTD.
    Inventors: Hisashi HORI, Nobushiro SEO, Kosuke YAMANAKA
  • Publication number: 20200324365
    Abstract: A method for manufacturing a liquid cooling jacket has a feature of using a primary joining rotary tool provided with a tip side pin and a base side pin having a taper angle larger than a taper angle of the tip side pin and comprising a first primary joining process in which inserting the tip side pin and the base side pin of the rotary tool that is rotating into the sealing body member and moving the rotary tool along the first abutted portion with an outer circumferential face of the base side pin being in contact with a front face of the sealing body member and with the outer circumferential face of the tip side pin being kept off a step side face of the peripheral wall step portion while having a second aluminum alloy of the sealing body member flow into the gap.
    Type: Application
    Filed: September 27, 2018
    Publication date: October 15, 2020
    Applicant: NIPPON LIGHT METAL COMPANY, LTD.
    Inventors: Hisashi HORI, Nobushiro SEO, Kosuke YAMANAKA
  • Publication number: 20200282489
    Abstract: A heat transfer plate manufacturing method in which a tip end-side pin of a rotation tool, as rotating, is inserted into a butt part, and friction stirring is performed with an outer peripheral surface of a base end-side pin in contact with a front surfaces of a base member and a lid plate, with the base end-side pin and a flat surface in contact with the base member and the lid plate, and with a tip end surface of a protrusion part in contact with only the base member, is provided.
    Type: Application
    Filed: May 15, 2018
    Publication date: September 10, 2020
    Applicant: NIPPON LIGHT METAL COMPANY, LTD.
    Inventors: Hisashi HORI, Nobushiro SEO, Kosuke YAMANAKA
  • Publication number: 20200254556
    Abstract: Provided is a method for manufacturing a liquid cooling jacket including a jacket body and a sealing body joined to the jacket body. The method includes steps of: preparing; placing; first primary joining with a rotary tool; and second primary joining with the rotary tool. The rotary tool includes a base end pin and a distal end pin. The distal end pin includes a flat surface and a protrusion protruding from the flat surface. In the first primary joining and the second primary joining, friction stirring is performed in a state where the jacket body and the sealing body are brought in contact with the flat surface of the distal end pin and the base end pin and only the jacket body is brought in contact with a distal end surface of the protrusion.
    Type: Application
    Filed: August 16, 2018
    Publication date: August 13, 2020
    Applicant: NIPPON LIGHT METAL COMPANY, LTD.
    Inventors: Hisashi HORI, Nobushiro SEO, Kosuke YAMANAKA
  • Publication number: 20200164462
    Abstract: Provided is a method for manufacturing a liquid-cooled jacket, to reduce the size of a recessed groove on a surface of a metal member and also to reduce roughness of a jointed surface. The method includes: a placing step of placing a sealing body on a jacket body, a first main joining step of performing friction stirring by moving a main joining rotary tool around to a first overlapped portion, and a second main joining step of performing friction stirring to a second overlapped portion. The main joining rotary tool has a base-end-side pin and a tip-end-side pin. A taper angle of the base-end-side pin is greater than a taper angle of the tip-end-side pin and a stairs-like pin step portion is formed on an outer circumferential surface of the base-end-side pin.
    Type: Application
    Filed: July 20, 2018
    Publication date: May 28, 2020
    Applicant: NIPPON LIGHT METAL COMPANY, LTD.
    Inventors: Hisashi HORI, Nobushiro SEO, Kosuke YAMANAKA
  • Patent number: 9662755
    Abstract: Provided is a vehicle steering system that is able to restrict a travel amount of a steered shaft in a housing, that is small and that has an excellent strength. The vehicle steering system is a steer-by-wire vehicle steering system that converts rotative power of electric motors into a movement of a steered shaft in an axial direction via a ball screw mechanism. One of contact portions at respective ends of a screw shaft at an intermediate part of the steered shaft passes through a rotor based on a moving direction of the steered shaft so as to contact a corresponding one of the corresponding stoppers thereby restricting a travel amount of the steered shaft. The stoppers are made of a material different from that of the housing and having a high strength.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: May 30, 2017
    Assignee: JTEKT CORPORATION
    Inventor: Kosuke Yamanaka
  • Patent number: 9610659
    Abstract: Provided is a vehicle steering system that is able to restrict a travel amount of a steered shaft in a housing, that is small and that has an excellent strength. The vehicle steering system is a steer-by-wire vehicle steering system that converts rotative power of electric motors into a movement of a steered shaft in an axial direction via a ball screw mechanism. One of contact portions at respective ends of a screw shaft at an intermediate part of the steered shaft passes through a rotor based on a moving direction of the steered shaft so as to contact a corresponding one of the corresponding stoppers thereby restricting a travel amount of the steered shaft. The stoppers are made of a material different from that of the housing and having a high strength.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: April 4, 2017
    Assignee: JTEKT CORPORATION
    Inventor: Kosuke Yamanaka
  • Publication number: 20150209921
    Abstract: Provided is a vehicle steering system that is able to restrict a travel amount of a steered shaft in a housing, that is small and that has an excellent strength. The vehicle steering system is a steer-by-wire vehicle steering system that converts rotative power of electric motors into a movement of a steered shaft in an axial direction via a ball screw mechanism. One of contact portions at respective ends of a screw shaft at an intermediate part of the steered shaft passes through a rotor based on a moving direction of the steered shaft so as to contact a corresponding one of the corresponding stoppers thereby restricting a travel amount of the steered shaft. The stoppers are made of a material different from that of the housing and having a high strength.
    Type: Application
    Filed: April 6, 2015
    Publication date: July 30, 2015
    Inventor: Kosuke YAMANAKA
  • Patent number: 8960037
    Abstract: A ball screw device has a plurality of spiral raceways. One end and the other end of each raceway is connected via a bridge. An annular flange of a ball nut has a plurality of mounting portions at equal intervals in a circumferential direction. A fixing screw is fitted to each mounting portion. The bridges arranged so as to overlap with the annular flange in position in an axial direction are arranged at positions different in the circumferential direction from positions at which the mounting portions are arranged, and are arranged at unequal intervals in the circumferential direction.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: February 24, 2015
    Assignee: JTEKT Corporation
    Inventor: Kosuke Yamanaka
  • Patent number: 8950544
    Abstract: There are provided a ball screw that makes it possible to prevent a situation where a large load is applied to a part of a plurality of balls, and an electric power steering system including the ball screw. The ball nut is a component that surrounds a part of the male thread groove, and has a nut inner surface and a female thread groove. The female thread groove is formed in the nut inner surface, and forms a part of the rolling path. A female thread diameter varies according to a position in an axial direction of the ball nut. The female thread diameter is larger at each axial end of the ball nut than at an axially intermediate portion of the ball nut, and the female thread diameter is larger at one axial end than at the other axial end.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: February 10, 2015
    Assignee: JTEKT Corporation
    Inventors: Kazuya Yoshioka, Kosuke Yamanaka
  • Patent number: 8925938
    Abstract: A vehicle steering system includes a steered shaft, and stoppers which restrict an amount of movement of the steered shaft in an axial direction. The steered shaft has first outer peripheral faces, second outer peripheral faces, and annular stepped portions. Each stepped portion includes a contact portion that faces a corresponding one of the stoppers in the axial direction, a first corner portion that has a concave curved sectional shape and connects the first outer peripheral face to an inner end of the contact portion, and a second corner portion that has a concave curved sectional shape with a larger curvature radius than that of the first corner portion, and connects the first outer peripheral face to the second outer peripheral face, at a position in front of or behind a central axis of the steered shaft.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: January 6, 2015
    Assignee: JTEKT Corporation
    Inventor: Kosuke Yamanaka
  • Publication number: 20140144263
    Abstract: There are provided a ball screw that makes it possible to prevent a situation where a large load is applied to a part of a plurality of balls, and an electric power steering system including the ball screw. The ball nut is a component that surrounds a part of the male thread groove, and has a nut inner surface and a female thread groove. The female thread groove is formed in the nut inner surface, and forms a part of the rolling path. A female thread diameter varies according to a position in an axial direction of the ball nut. The female thread diameter is larger at each of axially ends of the ball nut than at an axially intermediate portion of the ball nut, and the female thread diameter is larger at one of the axially ends than at the other of the axially ends.
    Type: Application
    Filed: November 20, 2013
    Publication date: May 29, 2014
    Applicant: JTEKT CORPORATION
    Inventors: Kazuya YOSHIOKA, Kosuke YAMANAKA
  • Publication number: 20130340563
    Abstract: A rear wheel steering system includes a rack shaft, a neutral position locking apparatus that restricts the movement of the rack shaft in a rack axis direction, and a pin-driving device that drives a restriction pin. The neutral position locking apparatus has the restriction pin and a pin-receiving portion formed in the rack shaft. The restriction pin has a first pin-sidewall portion slanted with respect to a pin axis and a second pin-sidewall portion parallel to the pin axis. The pin-receiving portion has a first shaft-sidewall portion that contacts the first pin-sidewall portion when the position of the rack shaft in the rack axis direction is at a neutral position, and a second shaft-sidewall portion that contacts the second pin-sidewall portion when the position of the rack shaft in the rack axis direction is at a restriction position different from the neutral position.
    Type: Application
    Filed: June 18, 2013
    Publication date: December 26, 2013
    Inventors: Kosuke YAMANAKA, Masakazu FURUYOSHI, Toshiaki OYA
  • Publication number: 20130292201
    Abstract: Provided is a vehicle steering system that is able to restrict a travel amount of a steered shaft in a housing, that is small and that has an excellent strength. The vehicle steering system is a steer-by-wire vehicle steering system that converts rotative power of electric motors into a movement of a steered shaft in an axial direction via a ball screw mechanism. One of contact portions at respective ends of a screw shaft at an intermediate part of the steered shaft passes through a rotor based on a moving direction of the steered shaft so as to contact a corresponding one of the corresponding stoppers thereby restricting a travel amount of the steered shaft. The stoppers are made of a material different from that of the housing and having a high strength.
    Type: Application
    Filed: February 2, 2012
    Publication date: November 7, 2013
    Applicant: JTEKT CORPORATION
    Inventor: Kosuke Yamanaka