Patents by Inventor Hiroyuki Kawadu

Hiroyuki Kawadu 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).

  • Pulse rocket motor including a dividing sheet for separating the first grain propellant from the second grain propellant
    Patent number: 9151245
    Abstract: A pulse rocket motor has a hollow cylinder-like first grain situated in a rear section of a pressure vessel; a first igniter for igniting the first grain; a hollow cylinder-like second grain situated in a front section of the pressure vessel; a second igniter for igniting the second grain; and a dividing sheet member that covers the second grain within the pressure vessel. The dividing sheet member includes a dividing sheet expanding at least along the inner circumferential surface of the second grain and holders formed integrally with the dividing sheet at both ends of the dividing sheet by cure adhesion and attached to the pressure vessel. The dividing sheet includes a brittle portion that expands along the inner circumferential surface of the second grain through a rear end face of the second grain and is more brittle than other portions.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: October 6, 2015
    Assignee: IHI AEROSPACE CO., LTD.
    Inventors: Hiroyuki Kawadu, Ichiro Yamaguchi, Shuji Hagiwara, Shoji Endo, Tokuichiro Ojima
  • Pulse Rocket Motor
    Publication number: 20130111874
    Abstract: A pulse rocket motor has a hollow cylinder-like first grain situated in a rear section of a pressure vessel; a first igniter for igniting the first grain; a hollow cylinder-like second grain situated in a front section of the pressure vessel; a second igniter for igniting the second grain; and a dividing sheet member that covers the second grain within the pressure vessel. The dividing sheet member includes a dividing sheet expanding at least along the inner circumferential surface of the second grain and holders formed integrally with the dividing sheet at both ends of the dividing sheet by cure adhesion and attached to the pressure vessel. The dividing sheet includes a brittle portion that expands along the inner circumferential surface of the second grain through a rear end face of the second grain and is more brittle than other portions.
    Type: Application
    Filed: June 21, 2012
    Publication date: May 9, 2013
    Applicant: IHI AEROSPACE CO., LTD.
    Inventors: Hiroyuki Kawadu, Ichiro Yamaguchi, Shuji Hajiwara, Shoji Endo, Tokuichiro Ojima