Patents by Inventor Masayuki Kurashina

Masayuki Kurashina 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 absorbing mechanism using a porous material
    Patent number: 6109388
    Abstract: A sound absorbing mechanism using a porous material has a sound absorbing plate of a thin plate porous material made by partially heating for welding plastic particles and a supporting member for supporting the sound absorbing plate and forming a back air space. More than one pair of resonators having a separated back air space in the aforementioned back air space are fixed to the sound absorbing plate, and the resonators are disposed to be opposed to a sound insulator with the supporting member between. Plural reflecting members or increased sound absorbers may be disposed to be opposed to the surface of the sound absorbing plate opposite to the surface equipped with the resonators, or a perforated protecting plate fixing the plural reflecting members or the increased sound absorbers thereon are may be equipped. The sound absorbing mechanism has a superior sound absorption characteristic from lower frequencies to higher frequencies.
    Type: Grant
    Filed: November 4, 1998
    Date of Patent: August 29, 2000
    Assignees: Mitsubishi Electric Home Appliance Co., Ltd., Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kouji Tsukamoto, Katsuhisa Ootsuta, Shuichi Tani, Masayuki Kurashina, Toshihisa Imai
  • Sound absorbing mechanism using a porous material
    Patent number: 5905234
    Abstract: A sound absorbing mechanism using a porous material has a sound absorbing plate of a thin plate porous material made by partially heating for welding plastic particles and a supporting member for supporting the sound absorbing plate and forming a back air space. More than one pair of resonators having a separated back air space in the aforementioned back air space are fixed to the sound absorbing plate, and the resonators are disposed to be opposed to a sound insulator with the supporting member between. Plural reflecting members or increased sound absorbers may be disposed to be opposed to the surface of the sound absorbing plate opposite to the surface equipped with the resonators, or a perforated protecting plate fixing the plural reflecting members or the increased sound absorbers thereon are may be equipped. The sound absorbing mechanism has a superior sound absorption characteristic from lower frequencies to higher frequencies.
    Type: Grant
    Filed: June 20, 1995
    Date of Patent: May 18, 1999
    Assignees: Mitsubishi Electric Home Appliance Co., Ltd., Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kouji Tsukamoto, Katsuhisa Ootsuta, Shuichi Tani, Masayuki Kurashina, Toshihisa Imai