Patents by Inventor Takehiko Ooshiro

Takehiko Ooshiro 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: 20210156021
    Abstract: A hard carbon film that forms a sliding surface of a sliding member, wherein the hard carbon film includes terminal atoms that bond to carbon atoms and has a plurality of protruding shaped parts, part of which protrude from the surface thereof, with the periphery of each of the plurality of protruding shaped parts being terminated by a terminal atom. A manufacturing method for the hard carbon film for producing the hard carbon film on a sliding surface of the sliding member using arc vapor deposition having graphite as the vaporization source, wherein a gas containing the terminal atoms that bond to carbon atoms is introduced, and the plurality of protruding shaped parts is grown on the surface of the hard carbon film while terminating the periphery of the plurality of protruding shaped parts by bonding of the terminal atoms to carbon atoms.
    Type: Application
    Filed: May 9, 2018
    Publication date: May 27, 2021
    Applicant: NIPPON ITF, INC.
    Inventors: Takehiko OOSHIRO, Yukako FUKUTANI, Koji MIYAKE
  • Publication number: 20200217416
    Abstract: A sliding member (10) including a coating film (1) composed of a hard carbon layer on a sliding surface (16) of a base material (11). The coating film has, when a cross section thereof is observed by a bright-field TEM image, a thickness within a range of 1 ?m to 50 ?m, and is configured by repeating units including black hard carbon layers (B), relatively shown in black, and white hard carbon layers (W), relatively shown in white, and laminated in a thickness direction, and comprise an inclined region, provided on a base material side, where thicknesses of white hard carbon layers (W) of the repeating units gradually increase in a thickness direction, and a homogeneous region\, provided on a surface side of the sliding member, where thicknesses of the white hard carbon layers (W) of the repeating units are the same or substantially the same in the thickness direction.
    Type: Application
    Filed: June 15, 2018
    Publication date: July 9, 2020
    Applicants: NIPPON PISTON RING CO., LTD., NIPPON ITF, INC.
    Inventors: Takahiro OKAZAKI, Yoshihiro ITO, Hiroyuki SUGIURA, Shinya KANAZAWA, Hideki MORIGUCHI, Akinori SHIBATA, Takehiko OOSHIRO
  • Patent number: 10634249
    Abstract: A piston ring in which carbon films with film qualities optimized to be adapted to required performance are formed on an outer circumferential sliding surface and top and bottom surfaces thereof with good productivity is provided, and a high-performance engine which employs the piston ring is also provided. In the piston ring, a carbon film is formed on an outer circumferential sliding surface and top and bottom surfaces. The carbon film contains a stacking of at least two types of carbon film layers with different film qualities, and a thickness ratio of the two types of carbon film layers is different between the outer circumferential sliding surface and the top and bottom surfaces.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: April 28, 2020
    Assignees: Nippon ITF, Inc., Honda Motor Co., Ltd.
    Inventors: Takehiko Ooshiro, Koji Miyake, Masanori Tsujioka, Satoshi Yoshida
  • Patent number: 10458548
    Abstract: Provided is a piston ring having excellent low-friction properties and abrasion resistance manufactured without the need for precision control using an ordinary film formation device that does not have a special function.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: October 29, 2019
    Assignees: NIPPON ITF, INC., Honda Motor Co., Ltd.
    Inventors: Takehiko Ooshiro, Koji Miyake, Masanori Tsujioka, Satoshi Yoshida
  • Publication number: 20180371608
    Abstract: The purpose of the invention is to provide technology, which, in addition to being capable of forming thick hard carbon films of excellent durability even using PVD, is able to establish both chipping resistance and wear resistance in the formed hard carbon film and able to improve low friction properties and peeling resistance. Provided is a coating film to be coated on the surface of a substrate, the coating film having a total film thickness of greater than 1 ?m to 50 ?m wherein: when a cross-section is observed using bright field TEM images, white hard carbon layers that are shown as relatively white and black hard carbon layers that are shown as black are alternately laminated in the thickness direction; and the white hard carbon layers have regions that have grown in a fan-shape in the thickness direction.
    Type: Application
    Filed: December 16, 2016
    Publication date: December 27, 2018
    Applicants: NIPPON ITF, INC., NIPPON PISTON RING CO., LTD.
    Inventors: Hideki MORIGUCHI, Akinori SHIBATA, Takehiko OOSHIRO, Yoshihiro ITO, Takahiro OKAZAKI, Hiroyuki SUGIURA
  • Patent number: 10077839
    Abstract: Provided are a piston ring which, even when a sleeve constituted of an aluminum alloy is used, can sufficiently show the required low frictional properties, wear resistance, and low counterpart-material attacking properties, and a process for producing the piston ring. The piston ring has a rigid carbon film formed as the outermost layer thereof and serving as a sliding surface with a sleeve constituted of an aluminum alloy, wherein the rigid carbon film gives an X-ray diffraction pattern that has peaks assigned to graphite crystals. The rigid carbon film of the piston ring is formed using a chemical vapor deposition method. The rigid carbon film of the piston ring has a hydrogen content which is at least 20 atm % but lower than 30 atm %, and gives a Raman spectrum in which the ratio of the area (ID) of D-band peaks to the area (IG) of G-band peaks, ID/IG, is 0.5-2.0.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: September 18, 2018
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Takehiko Ooshiro, Koji Miyake, Satoshi Yoshida, Eishi Fujimagari, Takeyuki Yamasaki, Hidetoshi Chiba
  • Publication number: 20180238450
    Abstract: Provided is a piston ring having excellent low-friction properties and abrasion resistance manufactured without the need for precision control using an ordinary film formation device that does not have a special function.
    Type: Application
    Filed: August 10, 2015
    Publication date: August 23, 2018
    Applicants: NIPPON ITF, INC., Honda Motor Co.,Ltd.
    Inventors: Takehiko OOSHIRO, Koji MIYAKE, Masanori TSUJIOKA, Satoshi YOSHIDA
  • Publication number: 20180231125
    Abstract: A piston ring in which carbon films with film qualities optimized to be adapted to required performance are formed on an outer circumferential sliding surface and top and bottom surfaces thereof with good productivity is provided, and a high-performance engine which employs the piston ring is also provided. In the piston ring, a carbon film is formed on an outer circumferential sliding surface and top and bottom surfaces. The carbon film contains a stacking of at least two types of carbon film layers with different film qualities, and a thickness ratio of the two types of carbon film layers is different between the outer circumferential sliding surface and the top and bottom surfaces.
    Type: Application
    Filed: August 10, 2015
    Publication date: August 16, 2018
    Applicants: Nippon ITF, Inc., Honda Motor Co.,Ltd.
    Inventors: Takehiko OOSHIRO, Koji MIYAKE, Masanori TSUJIOKA, Satoshi YOSHIDA
  • Publication number: 20170167608
    Abstract: Provided are a piston ring which, even when a sleeve constituted of an aluminum alloy is used, can sufficiently show the required low frictional properties, wear resistance, and low counterpart-material attacking properties, and a process for producing the piston ring. The piston ring has a rigid carbon film formed as the outermost layer thereof and serving as a sliding surface with a sleeve constituted of an aluminum alloy, wherein the rigid carbon film gives an X-ray diffraction pattern that has peaks assigned to graphite crystals. The rigid carbon film of the piston ring is formed using a chemical vapor deposition method. The rigid carbon film of the piston ring has a hydrogen content which is at least 20 atm % but lower than 30 atm %, and gives a Raman spectrum in which the ratio of the area (ID) of D-band peaks to the area (IG) of G-band peaks, ID/IG, is 0.5-2.0.
    Type: Application
    Filed: February 13, 2014
    Publication date: June 15, 2017
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Takehiko OOSHIRO, Koji MIYAKE, Satoshi YOSHIDA, Eishi FUJIMAGARI, Takeyuki YAMASAKI, Hidetoshi CHIBA
  • Patent number: 4537073
    Abstract: For the inspection of a square billet, an ultrasonic testing technique using an angle beam is performed using a phased array system. The phased array probe is disposed in a plane perpendicular to the axial direction of a square billet, at a prescribed distance from the surface of the billet and set at a prescribed angle with respect to the billet surface. The billet is inspected both inside and at the surface layer when the ultrasonic beam is electronically scanned. Inspection of the surface layer only is also performed using a surface defect inspection apparatus. Determination of internal defects (including subsurface defects) is performed based on the subtraction of information from the surface defect inspection from the information from the ultrasonic inspection.
    Type: Grant
    Filed: December 21, 1983
    Date of Patent: August 27, 1985
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Takehiko Ooshiro, Masayoshi Iwasaki, Kousuke Sahara, Norio Suzuki, Hitoshi Utsumi, Kazuo Miyake, Kenji Aburatani