Patents by Inventor Youjirou Kakoki

Youjirou Kakoki 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).

  • Rack and pinion steering apparatus and method of manufacturing rack shaft
    Patent number: 7631428
    Abstract: A rack and pinion steering apparatus which does not need quenching of the rack shaft after gear cutting of the rack shaft in manufacturing processes is provided. The rack and pinion steering apparatus comprises a pinion shaft and a rack shaft meshing with the pinion shaft. The rack shaft is formed to have a substantially uniform hardness.
    Type: Grant
    Filed: November 29, 2004
    Date of Patent: December 15, 2009
    Assignee: JTEKT Corporation
    Inventors: Takayasu Yamazaki, Shirou Nakano, Hironori Yamato, Youjirou Kakoki
  • Rack and pinion steering apparatus and method of manufacturing rack shaft
    Publication number: 20050139026
    Abstract: A rack and pinion steering apparatus which does not need quenching of the rack shaft after gear cutting of the rack shaft in manufacturing processes is provided. The rack and pinion steering apparatus comprises a pinion shaft and a rack shaft meshing with the pinion shaft. The rack shaft is formed to have a substantially uniform hardness.
    Type: Application
    Filed: November 29, 2004
    Publication date: June 30, 2005
    Applicant: Koyo Seiko Co., Ltd.
    Inventors: Takayasu Yamazaki, Shirou Nakano, Hironori Yamato, Youjirou Kakoki