TREA

having a central part for making a pilot tunnel and a follow-up part for enlarging the pilot tunnel

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Industry

  • CPC
  • E21D9/113
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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

E21D9/113having a central part for making a pilot tunnel and a follow-up part for enlarging the pilot tunnel
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Tunnel boring machine
    • Patent number 11,448,069
    • Issue date Sep 20, 2022
    • Malcolm John Peardon
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Unmanned intelligent mining machine
    • Patent number 9,494,036
    • Issue date Nov 15, 2016
    • Xinping Han
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Device for advancing drillings in the ground
    • Patent number 7,658,244
    • Issue date Feb 9, 2010
    • Wirth Maschinen-und Bohrgerate-Fabrik GmbH
    • Michael Mohrmann
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Tunnel excavator
    • Patent number 5,931,601
    • Issue date Aug 3, 1999
    • Komatsu Ltd.
    • Shinichi Terada
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3736771
    • Patent number 3,736,771
    • Issue date Jun 5, 1973
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3639006
    • Patent number 3,639,006
    • Issue date Feb 1, 1972
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3511539
    • Patent number 3,511,539
    • Issue date May 12, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3493165
    • Patent number 3,493,165
    • Issue date Feb 3, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3437380
    • Patent number 3,437,380
    • Issue date Apr 8, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3387892
    • Patent number 3,387,892
    • Issue date Jun 11, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3386520
    • Patent number 3,386,520
    • Issue date Jun 4, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2864600
    • Patent number 2,864,600
    • Issue date Dec 16, 1958
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2837325
    • Patent number 2,837,325
    • Issue date Jun 3, 1958
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2798707
    • Patent number 2,798,707
    • Issue date Jul 9, 1957
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents