TREA

by means of heads or tool-carrying sectors implementing an oscillating rotary motion

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Industry

  • CPC
  • E21D9/111
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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

E21D9/111by means of heads or tool-carrying sectors implementing an oscillating rotary motion
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Tunnel boring machine
    • Patent number 10,539,016
    • Issue date Jan 21, 2020
    • XCMG-KAIGONG HEAVY INDUSTRY NANJING CO., LTD
    • Yanqi Su
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Device, system and method for reinforcing a tunnel
    • Patent number 9,840,913
    • Issue date Dec 12, 2017
    • X Development LLC
    • Gabriella Levine
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3510170
    • Patent number 3,510,170
    • Issue date May 5, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3355215
    • Patent number 3,355,215
    • Issue date Nov 28, 1967
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    TUNNEL BORING MACHINE
    • Publication number 20190264563
    • Publication date Aug 29, 2019
    • XCMG-KAIGONG HEAVY INDUSTRY NANJING CO., LTD.
    • Yanqi SU
    • E21 - EARTH DRILLING MINING