TREA

Pile type supports

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Industry

  • CPC
  • E21D23/0017
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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

E21D23/0017Pile type supports
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Roof support for underground excavations such as coal mines
    • Patent number 5,178,494
    • Issue date Jan 12, 1993
    • Voest-Alpine Bergtechnik Gesellschaft m.b.H.
    • Alfred Zitz
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mobile stope support apparatus
    • Patent number 5,133,626
    • Issue date Jul 28, 1992
    • Crucible S.A.
    • Gregory Sleziak
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Supporting frame
    • Patent number 4,613,256
    • Issue date Sep 23, 1986
    • Voest-Alpine Aktiengesellschaft
    • Alfred Zitz
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mining system
    • Patent number 4,411,559
    • Issue date Oct 25, 1983
    • Aunald Jopling
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support assembly
    • Patent number 4,217,067
    • Issue date Aug 12, 1980
    • Gewerkschaft Eisenhutte Westfalia
    • Gunter Lagodka
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support assembly
    • Patent number 4,184,791
    • Issue date Jan 22, 1980
    • Gewerkschaft Eisenhutte Westfalia
    • Kunibert Becker
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof supports
    • Patent number 4,139,325
    • Issue date Feb 13, 1979
    • Fletcher Sutcliffe Wild Limited
    • Lewis R. Bower
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Roof support
    • Patent number 4,114,385
    • Issue date Sep 19, 1978
    • Charbonnages de France
    • Alfred Alphonse Marie Valantin
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Roof supports
    • Patent number 4,109,473
    • Issue date Aug 29, 1978
    • Charbonnages de France
    • Alfred A. Valantin
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support and method in longwall mining of thick mineral seams
    • Patent number 4,065,929
    • Issue date Jan 3, 1978
    • Atlantic Richfield Company
    • Terry Lee Simpson
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof supports
    • Patent number 4,041,714
    • Issue date Aug 16, 1977
    • Gullick Dobson Limited
    • Archelaius Dawson Allen
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support
    • Patent number 4,010,618
    • Issue date Mar 8, 1977
    • Dowty Mining Equipment Limited
    • John Hirst Walker
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3925995
    • Patent number 3,925,995
    • Issue date Dec 16, 1975
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3672174
    • Patent number 3,672,174
    • Issue date Jun 27, 1972
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3466875
    • Patent number 3,466,875
    • Issue date Sep 16, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3418814
    • Patent number 3,418,814
    • Issue date Dec 31, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3399927
    • Patent number 3,399,927
    • Issue date Sep 3, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3392533
    • Patent number 3,392,533
    • Issue date Jul 16, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

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

    3347050
    • Patent number 3,347,050
    • Issue date Oct 17, 1967
    • E21 - EARTH DRILLING MINING