TREA

forming parts of the roof supports

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Industry

  • CPC
  • E21D23/081
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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

E21D23/081forming parts of the roof supports
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Self-advancing roof support for a longwall mining system
    • Patent number 10,767,481
    • Issue date Sep 8, 2020
    • Caterpillar Global Mining Europe GmbH
    • Patrick Clamp
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mineral mining installation
    • Patent number 4,639,169
    • Issue date Jan 27, 1987
    • Gewerkschaft Eisenhutte Westfalia
    • Kunibert Becker
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support and attachment means therefor
    • Patent number 4,605,341
    • Issue date Aug 12, 1986
    • Dobson Park Industries PLC.
    • Archelaius D. Allen
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine-roof supports
    • Patent number 4,568,222
    • Issue date Feb 4, 1986
    • Dowty Mining Equipment Limited
    • Nigel Hill
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Coal face support
    • Patent number 4,560,306
    • Issue date Dec 24, 1985
    • Dobson Park Industries Limited
    • Raymond G. Murfitt
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Two part mine roof support unit
    • Patent number 4,401,399
    • Issue date Aug 30, 1983
    • Gewerkschaft Eisenhutte Westfalia
    • Kunibert Becker
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Advance mechanism for a mine roof support assembly
    • Patent number 4,390,308
    • Issue date Jun 28, 1983
    • Gewerkschaft Eisenhutte Westfalia
    • Kunibert Becker
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Advance mechanism for a mine roof support unit
    • Patent number 4,379,661
    • Issue date Apr 12, 1983
    • Gewerkschaft Eisenhutte Westfalia
    • Egon Wojaczek
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Self-advancing mineral mining installation including tilting machin...
    • Patent number 4,372,618
    • Issue date Feb 8, 1983
    • Union Special G.m.b.H.
    • John T. Pearey
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mineral mining installation
    • Patent number 4,272,129
    • Issue date Jun 9, 1981
    • Coal Industry (Patents) Limited
    • John T. Pearey
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Coupling gear for lemniscate shield timbering frame
    • Patent number 4,183,701
    • Issue date Jan 15, 1980
    • Thyssen Industrie AG
    • Harry Oppenlander
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Arrangement for tensioning a gateway conveyor in a sloping gateway
    • Patent number 4,167,998
    • Issue date Sep 18, 1979
    • Vereinigte Osterreichische Eisen- und Stahlwerke - Alpine Montan Aktiengesell...
    • Alfred J. Zitz
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Walking mine roof support
    • Patent number 4,140,430
    • Issue date Feb 20, 1979
    • Bochumer Eisenhutte Heintzmann GmbH & Co
    • Gunter Blumenthal
    • 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

    Guiding arrangement for underground excavating systems
    • Patent number 4,065,931
    • Issue date Jan 3, 1978
    • Bochumer Eisenhutte Heintzmann GmbH & Co.
    • Gustav Neu
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Pit prop assembly
    • Patent number 4,028,898
    • Issue date Jun 14, 1977
    • Bochumer Eisenhutte Heintzmann & Company
    • Gunter Blumenthal
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support
    • Patent number 3,952,525
    • Issue date Apr 27, 1976
    • Dowty Mining Equipment Limited
    • John Hirst Walker
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3564857
    • Patent number 3,564,857
    • Issue date Feb 23, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3412391
    • Patent number 3,412,391
    • Issue date Nov 19, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3383868
    • Patent number 3,383,868
    • Issue date May 21, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3373551
    • Patent number 3,373,551
    • Issue date Mar 19, 1968
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    3372551
    • Patent number 3,372,551
    • Issue date Mar 12, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3367117
    • Patent number 3,367,117
    • Issue date Feb 6, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3225547
    • Patent number 3,225,547
    • Issue date Dec 28, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3169377
    • Patent number 3,169,377
    • Issue date Feb 16, 1965
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents