Patents by Inventor Toshiaki Funabiki

Toshiaki Funabiki 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).

  • Patent number: 6503639
    Abstract: A press-formed product which is characterized by having a large number of linear concave portions 11 in the region (such as the side wall 31 of the press-formed product 30) which has undergone bending or bending-unbending deformation during press-forming, said linear concave portions satisfying the following requirements. D/P≦0.03×t/1.2 and 0.02t<D≦0.5t where, P (mm) is an interval between the linear concave portions 11, D (mm) is a depth of the linear concave portions, and t (mm) is a wall thickness of the press-formed product. A method of producing a press-formed product, said method being characterized by using a die having linear projections on its forming surface in such a way that the edges of said linear projections cut into the blank in the region which has undergone bending or bending-unbending deformation during press-forming, thereby correcting warpage at the same time of press-forming.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: January 7, 2003
    Assignee: Kobe Steel, Ltd.
    Inventors: Jiro Iwaya, Koichi Kani, Toshiaki Funabiki