Patents by Inventor Yuji Yammoto

Yuji Yammoto 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).

  • Publication number: 20090008211
    Abstract: A clutch member and a process for manufacturing the same. In the clutch member, a steel sheet has an initial composition of 0.32 to 0.38% of C, 0.15% or less of Si, 0.3 to 0.5% of Mn, and 0.16 to 0.60% of Cr, by mass; and has an initial uniformly dispersed structure of carbide with an average particle diameter of 0.1 to 1.2 ?m; and is subjected to punch and subsequent heat treatment for the main body to have a tensile strength of 1307 to 1633 MPa, hardness of 400 to 500 HV, impact value of 70 J/cm2 or more, and degree of flatness of 0.15% or less which is obtained by a formula of F=d/D where d is camber of the flat portion and D is a diameter of a circumscribed circle of the main body.
    Type: Application
    Filed: February 27, 2006
    Publication date: January 8, 2009
    Applicant: Aisin Seiki Kabushiki Kaisha
    Inventor: Yuji Yammoto