Taiheiyo Engineering Corporation

Taiiheiyo Engineering Incorporated

Tsunetoshi Ito

Ken Takahashi

Hajime Endo

Shigeo Nakajima

Toshio Shimada

Masao Hujimori

Hideo Inoue

Nobuo Kiyama

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.

Roof sensing control of shearer in longwall mining

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.

Mining apparatus

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.

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.

Apparatus for remotely operating self-advancing supports or the like

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.

Longwall coal mining machine with plural cutters on sub-ranging arm

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.

Growing community of inventors

Yokohama, Japan

Tsunetoshi Ito