Patents by Inventor Fujiharu Hirose

Fujiharu Hirose 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 explosively expanding tubes
    Patent number: 3939681
    Abstract: This invention provides a method of securing the tube ends of a plurality of explosively expandable metal tubes to a tube plate in which the tubes are inserted utilizing explosive cartridges equipped with a heat sensitive means. The heat sensitive means is in operative proximity to the explosive charges. There are also provided heating means capable of effectively heating the heat sensitive means. Expansion of the tubes located at multiple positions is effected by successively exploding the charges by the application of heat energy to the heat sensitive means.
    Type: Grant
    Filed: June 17, 1974
    Date of Patent: February 24, 1976
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hirohiko Yoshitomi, Junji Hashimoto, Taro Kodama, Fujiharu Hirose