Patents by Inventor Yoshifumi Kusaka

Yoshifumi Kusaka 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).

  • Filtering apparatus
    Patent number: 8778183
    Abstract: A filtering apparatus that sucks liquid in hollow portions (10) of the filtering elements (1) via suction pipes (3) so that liquid passes the filtering elements and is filtered. Each suction pipe has suction holes (4) connected to the hollow portions. The suction pipes are inserted into through holes (2) of the filtering elements. The filtering elements are arranged side by side and connected to the suction pipes. A ring-shaped packing is interposed between the filtering elements, and water-tightly seals the clearance between the filtering element and the suction pipe. The through holes are arranged at peripheral locations of each filtering element. The suction pipes are inserted into the through holes of each filtering element. The filtering elements are held at the peripheral locations by the suction pipes.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: July 15, 2014
    Assignee: AWA Paper Mfg. Co., Ltd.
    Inventors: Koichi Nakagawa, Yoshifumi Kusaka, Daisuke Nii, Daisuke Fujieda
  • Laminated material of segregating membrane and segregating membrane supporting material, and its method of manufacture
    Patent number: 7071130
    Abstract: Segregating membrane supporting material is a three-dimensional assembly of fibers thermo-compressed into non-woven fabric, and the non-woven fabric fibers are joined together in sheet form. This segregating membrane supporting material is non-woven fabric, including at least 10 weight % polyacrylonitrile-based synthetic fibers, which is thermo-compressed to give an overall bulk density 40% to 75% of the density of the fibers which make up the non-woven fabric.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: July 4, 2006
    Assignees: Awa Paper Mfg. Co., Ltd., Japan Exlan Company Limited
    Inventors: Yoshitsugu Hama, Hideo Naka, Yoshifumi Kusaka, Akihiro Okubo
  • Laminated material of segregating membrane and segregating membrane supporting material, and its method of manufacture
    Publication number: 20050176330
    Abstract: Segregating membrane supporting material is a three-dimensional assembly of fibers thermo-compressed into non-woven fabric, and the non-woven fabric fibers are joined together in sheet form. This segregating membrane supporting material is non-woven fabric, including at least 10 weight % polyacrylonitrile-based synthetic fibers, which is thermo-compressed to give an overall bulk density 40% to 75% of the density of the fibers which make up the non-woven fabric.
    Type: Application
    Filed: July 21, 2003
    Publication date: August 11, 2005
    Inventors: Yoshitsugu Hama, Hideo Naka, Yoshifumi Kusaka, Akihiro Okubo
  • Semipermeable membrane support and process of preparation thereof
    Patent number: 6919026
    Abstract: A semipermeable membrane support includes, a non-woven fabric including main fiber and binder fiber, both of which are formed of synthetic resin fine fiber, the non-woven fabric being manufactured by heating and pressing after paper making, wherein the semipermeable membrane support has a ratio of a tensile strength in a paper feeding direction to that in a width direction of 2:1 to 1:1.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: July 19, 2005
    Assignees: Awa Paper Mfg. Co., Ltd., Nitto Denko Corporation
    Inventors: Yoshitsugu Hama, Yoshifumi Kusaka, Akihiro Okubo
  • Semipermeable membrane support and process of preparation thereof
    Publication number: 20020056535
    Abstract: A semipermeable membrane support includes, a non-woven fabric including main fiber and binder fiber, both of which are formed of synthetic resin fine fiber, the non-woven fabric being manufactured by heating and pressing after paper making, wherein the semipermeable membrane support has a ratio of a tensile strength in a paper feeding direction to that in a width direction of 2:1 to 1:1.
    Type: Application
    Filed: September 20, 2001
    Publication date: May 16, 2002
    Inventors: Yoshitsugu Hama, Yoshifumi Kusaka, Akihiro Okubo