Patents by Inventor Hiromichi Akamatsu

Hiromichi Akamatsu 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).

  • Sound increase apparatus
    Patent number: 7621370
    Abstract: A sound increase apparatus includes a partition wall adapted to divide an engine room for defining a first engine room space that is located on a side of a dash panel and a second engine room space in which an engine is installed, and a first pressure fluctuation amplification unit inter-communicating an engine inlet pipe arranged in the second engine room space and the first engine room space. The first pressure fluctuation amplification unit amplifies a pressure fluctuation of a first frequency selected from a plurality of frequencies when pressure of air residing inside the engine inlet pipe fluctuates at the plurality of frequencies.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: November 24, 2009
    Assignees: Nissan Motor Co., Ltd., Mahle Filter Systems Japan Corporation
    Inventors: Hiroyuki Abe, Hiromichi Akamatsu, Akira Sasaki, Masashi Shinada, Yuta Saito
  • Device and method for amplifying suction noise
    Patent number: 7506626
    Abstract: An amplification device for amplifying suction noise of a vehicle is disclosed herein. An embodiment of the amplification device comprises an intake duct, a connecting pipe, an elastic membrane member and a contact member. The intake duct feeds air into an engine inlet port. A connecting pipe is connected to an interior of the intake duct. The elastic membrane member blocks a passageway inside of the contacting pipe. The contact member is connected to the connecting pipe and includes at least one portion that is adapted to selectively contact a surface of the elastic membrane member that faces the intake duct.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: March 24, 2009
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Akira Sasaki, Hiroyuki Abe, Shunsuke Ebata, Hiromichi Akamatsu, Hiroshi Miyauchi
  • Device and method for amplifying suction noise
    Publication number: 20070292281
    Abstract: An amplification device for amplifying suction noise of a vehicle is disclosed herein. An embodiment of the amplification device comprises an intake duct, a connecting pipe, an elastic membrane member and a contact member. The intake duct feeds air into an engine inlet port. A connecting pipe is connected to an interior of the intake duct. The elastic membrane member blocks a passageway inside of the contacting pipe. The contact member is connected to the connecting pipe and includes at least one portion that is adapted to selectively contact a surface of the elastic membrane member that faces the intake duct.
    Type: Application
    Filed: June 4, 2007
    Publication date: December 20, 2007
    Inventors: Akira Sasaki, Hiroyuki Abe, Shunsuke Ebata, Hiromichi Akamatsu, Hiroshi Miyauchi
  • Sound increase apparatus
    Publication number: 20060283658
    Abstract: A sound increase apparatus includes a partition wall adapted to divide an engine room for defining a first engine room space that is located on a side of a dash panel and a second engine room space in which an engine is installed, and a first pressure fluctuation amplification unit inter-communicating an engine inlet pipe arranged in the second engine room space and the first engine room space. The first pressure fluctuation amplification unit amplifies a pressure fluctuation of a first frequency selected from a plurality of frequencies when pressure of air residing inside the engine inlet pipe fluctuates at the plurality of frequencies.
    Type: Application
    Filed: June 19, 2006
    Publication date: December 21, 2006
    Inventors: Hiroyuki Abe, Hiromichi Akamatsu, Akira Sasaki, Masashi Shinada, Yuta Saito