Patents by Inventor Tsunetoshi Ito

Tsunetoshi Ito 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).

  • Roof sensing control of shearer in longwall mining
    Patent number: 4351565
    Abstract: The present invention is directed to a method for regulating position of a mining apparatus comprising the steps of transmission of a plurality of signals from a position detection device, interception of said signals at an edge of a mine at a distance away from the position detection device, and adjustment of the position of the mining apparatus to form an intersection between at least two signals at the edge of the mine.
    Type: Grant
    Filed: March 20, 1981
    Date of Patent: September 28, 1982
    Assignee: Taiheiyo Engineering Inc.
    Inventors: Ken Takahashi, Tsunetoshi Ito
  • Mining apparatus
    Patent number: 4290648
    Abstract: The present invention is directed to a mining apparatus which includes a position detection device comprising at least one projector and receiver to measure position of the apparatus in a mine by receiving projected signals reflected off an edge of the mine.
    Type: Grant
    Filed: August 31, 1979
    Date of Patent: September 22, 1981
    Assignee: Taiheiyo Engineering Inc.
    Inventors: Ken Takahashi, Tsunetoshi Ito
  • Mining apparatus
    Patent number: 4279443
    Abstract: The present invention is directed to a mining apparatus including a device comprising at least one pair of projectors for determining position of the apparatus in a mine by the intersection of paths from the projectors.
    Type: Grant
    Filed: October 11, 1979
    Date of Patent: July 21, 1981
    Assignee: Taiheiyo Engineering
    Inventors: Ken Takahashi, Tsunetoshi Ito
  • Apparatus for remotely operating self-advancing supports or the like
    Patent number: 4132079
    Abstract: Apparatus for remotely operating self-advancing supports or the like at a long-walled pit face of a coal mine comprises a receiver attached to every group of the supports which are arranged in front of and along the long-walled pit face, each of the receivers having a specific frequency, hydraulic cylinders attached to the support for causing the support to be operated, electromagnetic valves connected to the receiver to control the hydraulic cylinders, and a portable operating means including keys for specifying the groups of the supports, key switches for specifying the supports to be operated, and a transmitting circuit having operating switches, wherein operating signals are applied from the operating means via the radio system to the receivers.
    Type: Grant
    Filed: July 27, 1977
    Date of Patent: January 2, 1979
    Assignee: Taiheiyo Engineering Incorporated
    Inventors: Tsunetoshi Ito, Hideo Inoue
  • Longwall coal mining machine with plural cutters on sub-ranging arm
    Patent number: 4027918
    Abstract: A coal mining machine intended to be used in a pit having a long-walled pit face and having a mechanism in which two cutting drums are attached to the main ranging arm of a ranging drum shearer through a sub-ranging arm and the position of said cutting drums is defined by the cooperation of said main- and sub-ranging arms.
    Type: Grant
    Filed: February 26, 1976
    Date of Patent: June 7, 1977
    Assignee: Taiheiyo Engineering Incorporated
    Inventors: Masao Hujimori, Shigeo Nakajima, Ken Takahashi, Tsunetoshi Ito, Toshio Shimada, Hajime Endo
  • Self-advancing support for use in the pit of coal or metal mine
    Patent number: 4002037
    Abstract: A self-advancing support for use in the pit of coal or metal mine designed to support the pit roof after the mining operation by a shearer and having a mechanism for enabling the self-advancing support to be moved without using such means as a truck and a lift, said mechanism being housed within the self-advancing support and/or detached therefrom.
    Type: Grant
    Filed: March 3, 1976
    Date of Patent: January 11, 1977
    Assignee: Taiiheiyo Engineering Incorporated
    Inventors: Masao Hujimori, Shigeo Nakajima, Ken Takahashi, Tsunetoshi Ito, Toshio Shimada, Hajime Endo, Nobuo Kiyama