Patents by Inventor Hironori Oonishi

Hironori Oonishi 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).

  • Deep-drawing method and forming die therefor
    Patent number: 10160024
    Abstract: The present invention provides a deep-drawing method and a forming die therefor which can prevent the occurrence of cup side wall wrinkles and the collapse of the bottom during the process of deep-drawing a blank and which can increase the drawing ratio. A wrinkle pressing surface of a pressure pad (1) or an upper surface of a draw die (2) includes a flat inner edge surface (11), a tapered surface (12) which becomes deeper as the surface advances from the flat inner edge surface toward an outer circumference, a deepest flat surface (13), and a flat outer edge surface (14), which are provided in that order from an inner edge through which a draw punch passes toward an outer edge.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: December 25, 2018
    Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Hidekazu Tomaru, Nobuhisa Okabe, Hironori Oonishi
  • DEEP-DRAWING METHOD AND FORMING DIE THEREFOR
    Publication number: 20150217357
    Abstract: The present invention provides a deep-drawing method and a forming die therefor which can prevent the occurrence of cup side wall wrinkles and the collapse of the bottom during the process of deep-drawing a blank and which can increase the drawing ratio. A wrinkle pressing surface of a pressure pad (1) or an upper surface of a draw die (2) includes a flat inner edge surface (11), a tapered surface (12) which becomes deeper as the surface advances from the flat inner edge surface toward an outer circumference, a deepest flat surface (13), and a flat outer edge surface (14), which are provided in that order from an inner edge through which a draw punch passes toward an outer edge.
    Type: Application
    Filed: June 5, 2013
    Publication date: August 6, 2015
    Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Hidekazu Tomaru, Nobuhisa Okabe, Hironori Oonishi