Patents by Inventor Shigeru Iwasa

Shigeru Iwasa 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 a crown-shaped component
    Patent number: 6606895
    Abstract: Described is a method of manufacturing a crown-shaped component 3 having a plurality of axially extending protrusions 2 which are formed at an end of a cylindrical portion 1. The method comprises the steps of: upsetting the cylindrical portion into a cylindrical blank 10a having protrusions arrayed on and along the inner circumferential surface of a remaining part 12; annealing the cylindrical blank; removing the remaining part by cutting; and subjecting the resultant blank to a shot blasting process, whereby a magnetic characteristic of the resultant crown-shaped component is improved.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: August 19, 2003
    Assignees: Koyo Seiko Co., Ltd., Daido Tokushuko Kabushiki Kaisha
    Inventors: Takahiro Sanada, Yoshiro Sakai, Narito Shimizu, Jun Yatazawa, Shigeru Iwasa
  • Method of manufacturing a crown-shaped component
    Publication number: 20020073757
    Abstract: Described is a method of manufacturing a crown-shaped component 3 having a plurality of axially extending protrusions 2 which are formed at an end of a cylindrical portion 1. The method comprises the steps of: upsetting the cylindrical portion into a cylindrical blank 10a having protrusions arrayed on and along the inner circumferential surface of a remaining part 12; annealing the cylindrical blank; removing the remaining part by cutting; and subjecting the resultant blank to a shot blasting process, whereby a magnetic characteristic of the resultant crown-shaped component is improved.
    Type: Application
    Filed: September 20, 2001
    Publication date: June 20, 2002
    Inventors: Takahiro Sanada, Yoshiro Sakai, Narito Shimizu, Jun Yatazawa, Shigeru Iwasa