Patents by Inventor Takehiko Ichioka

Takehiko Ichioka 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).

  • Descaling device for steam generator
    Patent number: 6513462
    Abstract: A scale removing device for removes scale adhering to the interior of a shell-and-tube-heat-exchanger-type steam generator. The scale removing device is provided with a flexible lance (58) holding a high-pressure water hose (91) movable with respect to a tube plate, tube support plates, and heat-transfer tubes. A cleaning head (60) is mounted to the forward end of the flexible lance. Formed inside the cleaning head is a cavitation generating nozzle hole (99a, 99b) communicating with the high-pressure water hose. Bubbles are generated at the time of cleaning, and the impact pressure generated when the bubbles collapse is propagated to remove scale over a wide range.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: February 4, 2003
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Tadashi Shiraishi, Takehiko Ichioka, Hideya Okada, Fumitoshi Nakao, Toshiyuki Kinugasa