Patents by Inventor Masao Hujimori

Masao Hujimori 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).

  • 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