Patents by Inventor Fumihiko Sagi

Fumihiko Sagi 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).

  • Heat sink and method of making same
    Publication number: 20080283234
    Abstract: A heat sink has a heat pipe inside of which a working fluid is filled and which is extended by a predetermined length from a heat source in a heat radiation direction, and a radiation fin having a mountain portion and a valley portion formed in a longitudinal direction of the heat pipe, the mountain portion and the valley portion forming a continuous waveform. The radiation fin further has a step portion for fitting and retaining the heat pipe thereinto.
    Type: Application
    Filed: November 29, 2007
    Publication date: November 20, 2008
    Applicant: Hitachi Cable MEC-Tech, Ltd.
    Inventors: Fumihiko Sagi, Masami Murayama, Junichi Katougi
  • Multiple-hole tube for heat exchanger and manufacturing method thereof
    Publication number: 20070062682
    Abstract: A multiple-hole tube for heat exchanger, which can be manufactured in a simply way and at a low cost, and a manufacturing method thereof are disclosed. A pair of copper plates 20 with grooves 14 formed in a longer direction by rolling copper plate 11 with a form rolling roller are prepared. A sheet type brazing filler metal is interleaved between bond surfaces, each of which is a surface on the side of grooves 14 of copper plate 20. Copper plates 20 are heat-bonded to each other after both are aligned with respect to the grooves.
    Type: Application
    Filed: September 15, 2006
    Publication date: March 22, 2007
    Inventors: Fumihiko Sagi, Masami Murayama