Patents by Inventor Harutoshi Miyazaki

Harutoshi Miyazaki 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).

  • Method of drilling a branch line aperture after internal lining of a pipeline and a water plug used in the method
    Patent number: 4951758
    Abstract: This invention relates to a method of drilling apertures for branch lines (A) blocked by renovation lining of a main pipeline (B) which comprises setting a water plug (1) in the opening of each branch line (A) prior to lining, said water plug (1) carrying a position marker (14) comprising an antenna coil and a resonator adapted to be excited by a driving signal and, after stoppage of the driving signal, release a resonance signal remaining in the resonator from the antenna coil and said position marker being situated in a position which, upon setting of the water plug (1) in position, is substantially concentric with the axis of the branch line (A), causing an antenna assembly for detecting the resonance signal to travel within the main pipeline (B) to detect the position of the marker (14) and driving a drilling means (24) using the thus-detected marker position as a target from within the main pipeline.
    Type: Grant
    Filed: September 26, 1989
    Date of Patent: August 28, 1990
    Assignee: Sekisui Kagaku Kogo Kabushiki Kaisha
    Inventors: Masahisa Sonku, Yukio Yoshimura, Minoru Yasuhara, Naoki Kitahashi, Hirozo Hirayama, Harutoshi Miyazaki, Hisaichi Oi