TREA

by means of non-concentric rotary heads

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Industry

  • CPC
  • E21D9/116
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D9/00Tunnels or galleries, with or without linings Methods or apparatus for making thereof Layout of tunnels or galleries

Current Industry

E21D9/116by means of non-concentric rotary heads
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Automatic coal mining machine and fluidized coal mining method
    • Patent number 11,391,151
    • Issue date Jul 19, 2022
    • CHINA UNIVERSITY OF MINING & TECHNOLOGY, BEIJING
    • Yang Ju
    • B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...
  • Information Patent Grant

    Mining machine applicable to fluidized mining of ore bodies and min...
    • Patent number 11,261,732
    • Issue date Mar 1, 2022
    • CHINA UNIVERSITY OF MINING & TECHNOLOGY, BEIJING
    • Yang Ju
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hard rock roadway and tunnel boring machine with actively rotating...
    • Patent number 11,199,092
    • Issue date Dec 14, 2021
    • China University of Mining and Technology
    • Hongxiang Jiang
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Apparatus and method for driving a cavity in mining
    • Patent number 10,683,750
    • Issue date Jun 16, 2020
    • Herrenknecht Aktiengesellschaft
    • Timothée Couchoud
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3784257
    • Patent number 3,784,257
    • Issue date Jan 8, 1974
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3695718
    • Patent number 3,695,718
    • Issue date Oct 3, 1972
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3643998
    • Patent number 3,643,998
    • Issue date Feb 22, 1972
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3475057
    • Patent number 3,475,057
    • Issue date Oct 28, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3445137
    • Patent number 3,445,137
    • Issue date May 20, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3415574
    • Patent number 3,415,574
    • Issue date Dec 10, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3035822
    • Patent number 3,035,822
    • Issue date May 22, 1962
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2760766
    • Patent number 2,760,766
    • Issue date Aug 28, 1956
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    TUNNEL DRILLING MACHINE
    • Publication number 20120051843
    • Publication date Mar 1, 2012
    • KING ABDUL AZIZ CITY FOR SCIENCE AND TECHNOLOGY
    • Mazen A. Ba-abbad
    • E21 - EARTH DRILLING MINING