Patents by Inventor Koji Hamajima

Koji Hamajima 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).

  • Method of manufacturing constituent member of constant-velocity joint
    Patent number: 11859676
    Abstract: A method of manufacturing a constituent member of a constant-velocity joint includes: performing plastic working; and performing hardening of a material. The plastic working is performed with a material of the constituent member heated to a predetermined working temperature range. The hardening of the material is performed by utilizing heat applied for heating to the working temperature range in performing the plastic working as heat for the hardening of the material and cooling the material after performing the plastic working.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: January 2, 2024
    Assignee: JTEKT CORPORATION
    Inventors: Motonori Nakao, Yohei Fukumoto, Koji Hamajima, Keiichi Kamata, Kenjiro Ikeda, Shintaro Yoshinaga
  • METHOD OF MANUFACTURING CONSTITUENT MEMBER OF CONSTANT-VELOCITY JOINT
    Publication number: 20200200224
    Abstract: A method of manufacturing a constituent member of a constant-velocity joint includes: performing plastic working; and performing hardening of a material. The plastic working is performed with a material of the constituent member heated to a predetermined working temperature range. The hardening of the material is performed by utilizing heat applied for heating to the working temperature range in performing the plastic working as heat for the hardening of the material and cooling the material after performing the plastic working.
    Type: Application
    Filed: December 13, 2019
    Publication date: June 25, 2020
    Applicant: JTEKT CORPORATION
    Inventors: Motonori NAKAO, Yohei Fukumoto, Koji Hamajima, Keiichi Kamata, Kenjiro Ikeda, Shintaro Yoshinaga
  • Constant velocity joint, manufacturing method of constant velocity joint and jig for assembling constant velocity joint
    Patent number: 7540807
    Abstract: A constant velocity joint comprises an outer race, inner race and torque transmitting elements. The outer race has a cylindrical hollow part with an opening at one end and plural walls on an inner surface of the cylindrical hollow part. At the opening of the cylindrical hollow part, the walls have projections formed by a pin-drive. The inner race is assembled with the torque transmitting elements and press-fitted into the cylindrical hollow part of the outer race.
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: June 2, 2009
    Assignee: Jtekt Corporation
    Inventors: Eiji Nakagawa, Hiroyuki Kurono, Akiyoshi Abiko, Yoshimi Aoki, Yoshihiro Hanji, Hideaki Hiramatsu, Koji Hamajima, Tadashi Nomura
  • Constant velocity joint,manufacturing method of constant velocity joint and jig for assembling constant velocity joint
    Publication number: 20070243938
    Abstract: A constant velocity joint comprises an outer race, inner race and torque transmitting elements. The outer race has a cylindrical hollow part with an opening at one end and plural walls on an inner surface of the cylindrical hollow part. At the opening of the cylindrical hollow part, the walls have projections formed by a pin-drive. The inner race is assembled with the torque transmitting elements and press-fitted into the cylindrical hollow part of the outer race.
    Type: Application
    Filed: November 28, 2005
    Publication date: October 18, 2007
    Applicant: TOYODA KOKI KABUSHIKI KAISHA
    Inventors: Eiji Nakagawa, Hiroyuki Kurono, Akiyoshi Abiko, Yoshimi Aoki, Yoshihiro Hanji, Hideaki Hiramatsu, Koji Hamajima, Tadashi Nomura