Patents by Inventor Tadashi Naganawa

Tadashi Naganawa 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).

  • Power transmission shaft, power transmission device incorporating the same and method of forming the same
    Patent number: 7540808
    Abstract: A power transmission shaft includes a swaged boot-engaging groove on an outer circumference of thereof. Further, the power transmission shaft includes a reduced diameter portion provided in the vicinity of the boot-engaging groove. The reduced diameter portion is formed by swaging at the same time as the boot-engaging groove is formed.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: June 2, 2009
    Assignee: JTEKT Corporation
    Inventors: Hiroyuki Iwashita, Tadashi Naganawa, Isashi Kashiwagi
  • Power transmission shaft, power transmission device incorporating the same and method of forming the same
    Publication number: 20060217209
    Abstract: A power transmission shaft includes a swaged boot-engaging groove on an outer circumference of thereof. Further, the power transmission shaft includes a reduced diameter portion provided in the vicinity of the boot-engaging groove. The reduced diameter portion is formed by swaging at the same time as the boot-engaging groove is formed.
    Type: Application
    Filed: March 21, 2006
    Publication date: September 28, 2006
    Applicant: JTEKT Corporation
    Inventors: Hiroyuki Iwashita, Tadashi Naganawa, Isashi Kashiwagi