Patents by Inventor Tomohito Ishihara

Tomohito Ishihara 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).

  • Suction filter
    Patent number: 8893686
    Abstract: A pump unit having a fuel pump and a suction filter is provided in a sub tank of a fuel tank. A filter element sheet for the suction filter is formed in a cup shape, a bottom wall portion of which faces to an inner bottom surface of the sub tank. A suction port of the fuel pump is opened to a fuel passage formed in the inside of the suction filter, so that filtered fuel is sucked into the fuel pump. Multiple mountain fold portions and multiple valley fold portions are formed on a side wall of the cup-shaped filter element sheet, to thereby increase surface area for filtering the fuel.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: November 25, 2014
    Assignees: Denso Corporation, Kyosan Denki Co., Ltd.
    Inventors: Katsuhisa Yamada, Tetsuro Okazono, Hironobu Oki, Akihiro Ishitoya, Tomohito Ishihara
  • SUCTION FILTER
    Publication number: 20120240901
    Abstract: A pump unit having a fuel pump and a suction filter is provided in a sub tank of a fuel tank. A filter element sheet for the suction filter is formed in a cup shape, a bottom wall portion of which faces to an inner bottom surface of the sub tank. A suction port of the fuel pump is opened to a fuel passage formed in the inside of the suction filter, so that filtered fuel is sucked into the fuel pump. Multiple mountain fold portions and multiple valley fold portions are formed on a side wall of the cup-shaped filter element sheet, to thereby increase surface area for filtering the fuel.
    Type: Application
    Filed: March 21, 2012
    Publication date: September 27, 2012
    Applicants: KYOSAN DENKI CO., LTD., DENSO CORPORATION
    Inventors: Katsuhisa YAMADA, Tetsuro Okazono, Hironobu Oki, Akihiro Ishitoya, Tomohito Ishihara