Patents by Inventor Toshiyuki FUJITOMI

Toshiyuki FUJITOMI 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).

  • Electric power steering system and vehicle steering system
    Patent number: 8434585
    Abstract: Provided are an electric power steering system and a vehicle steering system each including rack-and-pinion mechanisms (14A, 14B). A rack shaft (3) has a first rack (7A) and a second rack (7B) that are formed on the axially opposite sides of the axial center of the rack shaft (3). The first rack (7A) has a regular pitch p between rack teeth, the second rack (7B) has a regular pitch p between rack teeth, and these pitches p are equal to each other. A predetermined difference is set between the phase of gear teeth engagement between a first pinion shaft (8A) and the first rack (7A), which constitute the first rack-and-pinion mechanism (14A), and the phase of gear teeth engagement between a second pinion shaft (8B) and the second rack (7B), which constitute the second rack-and-pinion mechanism (14B).
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: May 7, 2013
    Assignee: Jtekt Corporation
    Inventors: Toshiyuki Fujitomi, Minoru Sato, Yoshiki Maruyama, Motonari Ishizuka
  • ELECTRIC POWER STEERING SYSTEM AND VEHICLE STEERING SYSTEM
    Publication number: 20120160595
    Abstract: Provided are an electric power steering system and a vehicle steering system each including rack-and-pinion mechanisms (14A, 14B). A rack shaft (3) has a first rack (7A) and a second rack (7B) that are formed on the axially opposite sides of the axial center of the rack shaft (3). The first rack (7A) has a regular pitch p between rack teeth, the second rack (7B) has a regular pitch p between rack teeth, and these pitches p are equal to each other. A predetermined difference is set between the phase of gear teeth engagement between a first pinion shaft (8A) and the first rack (7A), which constitute the first rack-and-pinion mechanism (14A), and the phase of gear teeth engagement between a second pinion shaft (8B) and the second rack (7B), which constitute the second rack-and-pinion mechanism (14B).
    Type: Application
    Filed: December 19, 2011
    Publication date: June 28, 2012
    Applicant: JTEKT CORPORATION
    Inventors: Toshiyuki FUJITOMI, Minoru SATO, Yoshiki MARUYAMA, Motonari ISHIZUKA