Patents by Inventor Hirofumi Ishiwada

Hirofumi Ishiwada 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).

  • Vortex flow type water surface control device for draining device
    Patent number: 8979432
    Abstract: In a conventional storm overflow chamber of a combined sewer system, inflowing floating debris do not flow into an intercepting pipe in a rainy weather, and flow out to a public water body, causing a water pollution in the public water body. According to a vortex flow type water surface control device for a draining device of the present invention, a control plate (6) higher than at least a separating weir (1) is provided between an opening of an inflow pipe (2) and an opening of an intercepting pipe (3) in a storm overflow chamber of a combined sewer system. Moreover, a guide wall (7) higher than at least the separating weir (1) is provided along the separating weir between the opening of the inflow pipe (2) and the separating weir (1).
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: March 17, 2015
    Assignees: Tokyo Metropolitan Government, Tokyo metropolitan Sewerage Service Corporation, Nippon Koei Co., Ltd.
    Inventors: Ikuo Uemura, Hirofumi Ishiwada, Shouichi Banba, Aya Uchino, Tsuneo Ochiai, Hiroshi Komatsu, Shigeki Nishimura, Shigeru Tukada
  • Vortex flow type water surface control device for draining device
    Patent number: 8459900
    Abstract: A vortex flow type water surface control device for a draining device is provided. The vortex flow type water surface control device may include an inflow pipe, an outflow pipe, an intercepting pipe, and a separating weir that is disposed to block the intercepting pipe and the inflow pipe from the outflow pipe. The vortex flow type water surface control device may also include a control plate that is disposed between an opening of the inflow pipe and an opening of the intercepting pipe. A height of the control plate may be higher than at least a height of the separating weir. The control plate may be apart from the separating weir, and may approximately extend to a center axis of the intercepting pipe.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: June 11, 2013
    Assignees: Tokyo Metropolitan Government, Tokyo Metropolitan Sewerage Servce Corporation, Nippon Koei Co., Ltd.
    Inventors: Ikuo Uemura, Hirofumi Ishiwada, Shouichi Banba, Aya Uchino, Tsuneo Ochiai, Hiroshi Komatsu, Shigeki Nishimura, Shigeru Tukada
  • VORTEX FLOW TYPE WATER SURFACE CONTROL DEVICE FOR DRAINING DEVICE
    Publication number: 20110284441
    Abstract: A vortex flow type water surface control device for a draining device is provided. The vortex flow type water surface control device may include an inflow pipe, an outflow pipe, an intercepting pipe, and a separating weir that is disposed to block the intercepting pipe and the inflow pipe from the outflow pipe. The vortex flow type water surface control device may also include a control plate that is disposed between an opening of the inflow pipe and an opening of the intercepting pipe. A height of the control plate may be higher than at least a height of the separating weir. The control plate may be apart from the separating weir, and may approximately extend to a center axis of the intercepting pipe.
    Type: Application
    Filed: August 4, 2011
    Publication date: November 24, 2011
    Applicants: TOKYO METROPOLITAN GOVERNMENT, NIPPON KOEI CO. LTD., TOKYO METROPOLITAN SEWERAGE SERVICE CORPORATION
    Inventors: Ikuo UEMURA, Hirofumi ISHIWADA, Shouichi BANBA, Aya UCHINO, Tsuneo OCHIAI, Hiroshi KOMATSU, Shigeki NISHIMURA, Shigeru TUKADA
  • Vortex Flow Type Water Surface Control Device for Draining Device
    Publication number: 20080023074
    Abstract: In a conventional storm overflow chamber of a combined sewer system, inflowing floating debris do not flow into an intercepting pipe in a rainy weather, and flow out to a public water body, causing a water pollution in the public water body. According to a vortex flow type water surface control device for a draining device of the present invention, a control plate (6) higher than at least a separating weir (1) is provided between an opening of an inflow pipe (2) and an opening of an intercepting pipe (3) in a storm overflow chamber of a combined sewer system. Moreover, a guide wall (7) higher than at least the separating weir (1) is provided along the separating weir between the opening of the inflow pipe (2) and the separating weir (1).
    Type: Application
    Filed: August 2, 2004
    Publication date: January 31, 2008
    Applicants: TOKYO METROPOLITAN GOVERNMENT, TOKYO METROPOLITAN SEWERAGE SERVICE CORPORATION, NIPPON KOEI CO. LTD.
    Inventors: Ikuo Uemura, Hirofumi Ishiwada, Shouichi Banba, Aya Uchino, Tsuneo Ochiai, Hiroshi Komatsu, Shigeki Nishimura, Shigeru Tukada