TREA

Supports specially adapted for people walking or transporting material

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Industry

  • CPC
  • E21D23/0472
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D23/00Mine roof supports for step- by- step movement

Current Industry

E21D23/0472Supports specially adapted for people walking or transporting material
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Continuous sliding support gantry for a large passage
    • Patent number 4,358,224
    • Issue date Nov 9, 1982
    • Charbonnages de France
    • Guy Blanpain
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Sliding supporting gallery
    • Patent number 4,348,138
    • Issue date Sep 7, 1982
    • Charbonnages de France
    • Guy Blampain
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Sheltering apparatus for use in long wall mining
    • Patent number 4,189,257
    • Issue date Feb 19, 1980
    • Taiheiyo Engineering Inc.
    • Shigeo Nakajima
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Self-advancing mine roof supports
    • Patent number 4,102,140
    • Issue date Jul 25, 1978
    • Gullick Dobson Limited
    • Archelaius Dawson Allen
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Apparatus for protecting of coal mine workers
    • Patent number 4,067,618
    • Issue date Jan 10, 1978
    • Taiheiyo Engineering Inc.
    • Shigeo Nakajima
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Longwall mining roof support for double deck machines
    • Patent number 4,029,361
    • Issue date Jun 14, 1977
    • Gewerkschaft Eisenhutte Westfalia
    • Klaus Beckmann
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3375688
    • Patent number 3,375,688
    • Issue date Apr 2, 1968
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    3375668
    • Patent number 3,375,668
    • Issue date Apr 2, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3275918
    • Patent number 3,275,918
    • Issue date Sep 27, 1966
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

Patents Applicationslast 30 patents

  • Information Patent Application

    MINING UNDERGROUND FORMATIONS
    • Publication number 20180195390
    • Publication date Jul 12, 2018
    • Seneca Industries Inc.
    • John Dickinson
    • E21 - EARTH DRILLING MINING