Patents by Inventor Shiroyasu Shimazaki

Shiroyasu Shimazaki 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 and machine for constructing shafts
    Patent number: 5022789
    Abstract: There are disclosed a method and a machine for constructing a shaft having a substantially circular cross-section. According to the present invention, the shaft having a shotcrete formed on a peripheral wall thereof can be easily constructed. The shotcrete can be promptly formed on the peripheral wall by spraying concrete on the wall above the water level of the water in the shaft before the wall is damaged. Also, muck excavated from a working face of the shaft can be efficiently conveyed therefrom to outside of the shaft even if the shaft has a depth of more than hundreds of meters.
    Type: Grant
    Filed: November 17, 1988
    Date of Patent: June 11, 1991
    Assignee: Shimizu Construction Co., Ltd.
    Inventors: Akira Miyazaki, Yuichi Kikuchi, Yoshiyuki Ohara, Tomosburo Fujinaga, Takashi Kawata, Fumitoshi Mizutani, Tsugio Hida, Shiroyasu Shimazaki