Patents by Inventor Masaki Kajino

Masaki Kajino 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).

  • Low friction wear film and method for producing the same
    Patent number: 11905586
    Abstract: A low friction wear film includes a chromium layer provided on a surface of a metal substrate, a tungsten carbide layer provided on a surface of the chromium layer, and a diamond-like carbon layer as a top layer provided on a surface of the tungsten carbide layer. The tungsten carbide layer includes a chromium-tungsten carbide gradient layer and a tungsten carbide uniform layer. In the tungsten carbide layer, a tungsten-concentrated layer in which a tungsten simple substance is present is not provided at a boundary between the chromium-tungsten carbide gradient layer and the tungsten carbide uniform layer.
    Type: Grant
    Filed: April 26, 2021
    Date of Patent: February 20, 2024
    Assignees: AISIN CORPORATION, TOHKEN THERMO TECH CO., LTD
    Inventors: Chengji Jin, Hodo Suzuki, Masaki Kajino, Kazuya Kitamura, Naoyuki Omori
  • LOW FRICTION WEAR FILM AND METHOD FOR PRODUCING THE SAME
    Publication number: 20210340662
    Abstract: A low friction wear film includes a chromium layer provided on a surface of a metal substrate, a tungsten carbide layer provided on a surface of the chromium layer, and a diamond-like carbon layer as a top layer provided on a surface of the tungsten carbide layer. The tungsten carbide layer includes a chromium-tungsten carbide gradient layer and a tungsten carbide uniform layer. In the tungsten carbide layer, a tungsten-concentrated layer in which a tungsten simple substance is present is not provided at a boundary between the chromium-tungsten carbide gradient layer and the tungsten carbide uniform layer.
    Type: Application
    Filed: April 26, 2021
    Publication date: November 4, 2021
    Applicants: AISIN CORPORATION, TOHKEN THERMO TECH CO., LTD
    Inventors: Chengji JIN, Hodo SUZUKI, Masaki KAJINO, Kazuya KITAMURA, Naoyuki OMORI
  • Brightening chemical polishing solution for hardened steel article and method of chemically polishing said article in the solution
    Patent number: 5477976
    Abstract: A brightening chemical polishing solution for a hardened steel article (e.g., a carburized and quenched gear) comprises hydrofluoric acid having a molar concentration of from 0.2 to 2 mol/l, hydrogen peroxide having a molar concentration of from 0.4 to 4 mol/l, and water, a molar ratio of the hydrofluoric acid to the hydrogen peroxide being from 1:1.5 to 1:2.8. The steel article is quench hardened and is chemically polished in the solution. A shot-peening is additionally performed, prior to the polishing.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: December 26, 1995
    Assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenichi Suzuki, Masaki Kajino, Kazuyoshi Ogawa, Takashi Asano, Mineo Ogino, Hideo Aihara, Fumio Shimizu, Masazumi Onishi, Yasuyuki Suzuki
  • Brightening chemical polishing solution for hardened steel article
    Patent number: 5256316
    Abstract: A brightening chemical polishing solution for a hardened steel article (e.g., a carburized and quenched gear) comprises hydrofluoric acid having a molar concentration of from 0.2 to 2 mol/l, hydrogen peroxide having a molar concentration of from 0.4 to 4 mol/l, and water, a molar ratio of the hydrofluoric acid to the hydrogen peroxide being from 1:1.5 to 1:2.8. The steel article is quench hardened and is chemically polished in the solution. A shot-peening is additionally performed, prior to the polishing.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: October 26, 1993
    Assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenichi Suzuki, Masaki Kajino, Kazuyoshi Ogawa, Takashi Asano, Mineo Ogino, Hideo Aihara, Fumio Shimizu, Masazumu Onishi, Yasuyuki Suzuki