Patents by Inventor Masamitu Tateno

Masamitu Tateno 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).

  • Automatic tunnel face hydraulic pressure controlling apparatus in shield type hydraulic tunnel boring system
    Patent number: 4068484
    Abstract: An apparatus for automatically controlling tunnel face hydraulic pressure in a hydraulic chamber defined by a rotary cutter head and bulkhead in a shield type excavator used in hydraulic tunnel boring system including a pipe for feeding a hydraulic material with a feeding pump from a reservoir to the chamber and a pipe for discharging a mixture of the fed hydraulic material with ground formations excavated by the cutter head from the chamber to the reservoir with a discharging pump.
    Type: Grant
    Filed: February 9, 1977
    Date of Patent: January 17, 1978
    Assignee: Tekken Construction Co., Ltd.
    Inventors: Yasuyuki Iwamitu, Yoshiaki Uchida, Shigeru Kobayashi, Masamitu Tateno