Patents by Inventor Tadahiko Ooba

Tadahiko Ooba 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).

  • Antifouling system for structure exposed to seawater and heat exchanger
    Patent number: 6579429
    Abstract: A titanium sheet (4) serving as an anode-forming member is fixed on a tube plate (1a) of a heat exchanger (1) via a insulting sheet (5) and an insulating adhesive (6). The sheet (4) is coated with a film (3) of an electrochemically active, stable electrical catalyst. A dc power unit (7) has a positive electrode (7a) electrically connected to the sheet (4), and a negative electrode (7b) electrically connected to the tubes (1b). The inner surfaces of the tubes (1b) are used as a cathode for electrolysis for oxygen generation. An automatic potential controller (7c) adjusts potential difference between the electrodes (7a, 7b) such that oxygen is generated in seawater while generation of chlorine in seawater is suppressed. An external dc power unit (40) and a cathodic protection electrode (41) supply a cathodic protection current to the tubes (1b).
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: June 17, 2003
    Assignees: Kabushiki Kaisha Toshiba, Nakabohtec Corrosion Protecting Co., Ltd.
    Inventors: Shuichi Inagaki, Shigeru Sakurada, Shoji Nakashima, Tadahiko Ooba
  • Antifouling system for structure exposed to seawater and heat exchanger
    Publication number: 20020108849
    Abstract: A titanium sheet (4) serving as an anode-forming member is fixed on a tube plate (1a) of a heat exchanger (1) via a insulting sheet (5) and an insulating adhesive (6). The sheet (4) is coated with a film (3) of an electrochemically active, stable electrical catalyst. A dc power unit (7) has a positive electrode (7a) electrically connected to the sheet (4), and a negative electrode (7b) electrically connected to the tubes (1b). The inner surfaces of the tubes (1b) are used as a cathode for electrolysis for oxygen generation. An automatic potential controller (7c) adjusts potential difference between the electrodes (7a, 7b) such that oxygen is generated in seawater while generation of chlorine in seawater is suppressed. An external dc power unit (40) and a cathodic protection electrode (41) supply a cathodic protection current to the tubes (1b).
    Type: Application
    Filed: November 29, 2001
    Publication date: August 15, 2002
    Inventors: Shuichi Inagaki, Shigeru Sakurada, Shoji Nakashima, Tadahiko Ooba