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Positioning devices and stabilizing means for the props

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Industry

  • CPC
  • E21D23/0418
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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

E21D23/0418Positioning devices and stabilizing means for the props
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Hydraulic shield support system and pressure intensifier
    • Patent number 11,396,894
    • Issue date Jul 26, 2022
    • Caterpillar Global Mining Europe GmbH
    • Oliver Dwornik
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Apparatus for protecting roof tray when gob-side entry retaining en...
    • Patent number 10,822,949
    • Issue date Nov 3, 2020
    • China University of Mining and Technology
    • Jianbiao Bai
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic shield support
    • Patent number 7,237,983
    • Issue date Jul 3, 2007
    • DBT GmbH
    • Franz-Heinrich Suilmann
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Sliding stabilizer
    • Patent number 5,626,441
    • Issue date May 6, 1997
    • Boris Grebenyuk
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof supporting system
    • Patent number 4,274,764
    • Issue date Jun 23, 1981
    • Paul F. Curry
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof supports
    • Patent number 4,117,687
    • Issue date Oct 3, 1978
    • Fletcher Sutcliffe Wild Limited
    • Arthur Scarfe
    • 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

    Mine roof support
    • Patent number 3,996,753
    • Issue date Dec 14, 1976
    • Becorit Grubenausbau GmbH
    • Walter Lubojatsky
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Prop-and-shoe assemblies of self-advancing mine roof-supports
    • Patent number 3,985,328
    • Issue date Oct 12, 1976
    • Hermann Hemscheidt Maschinenfabrik
    • Hans Bull
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3832856
    • Patent number 3,832,856
    • Issue date Sep 3, 1974
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3651652
    • Patent number 3,651,652
    • Issue date Mar 28, 1972
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3646768
    • Patent number 3,646,768
    • Issue date Mar 7, 1972
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3638531
    • Patent number 3,638,531
    • Issue date Feb 1, 1972
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3561221
    • Patent number 3,561,221
    • Issue date Feb 9, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3535071
    • Patent number 3,535,071
    • Issue date Oct 20, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3534560
    • Patent number 3,534,560
    • Issue date Oct 20, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3530678
    • Patent number 3,530,678
    • Issue date Sep 29, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3484071
    • Patent number 3,484,071
    • Issue date Dec 16, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3436922
    • Patent number 3,436,922
    • Issue date Apr 8, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3425656
    • Patent number 3,425,656
    • Issue date Feb 4, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3397543
    • Patent number 3,397,543
    • Issue date Aug 20, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3397544
    • Patent number 3,397,544
    • Issue date Aug 20, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3383867
    • Patent number 3,383,867
    • Issue date May 21, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3381480
    • Patent number 3,381,480
    • Issue date May 7, 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

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

    3344610
    • Patent number 3,344,610
    • Issue date Oct 3, 1967
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3328967
    • Patent number 3,328,967
    • Issue date Jul 4, 1967
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3328968
    • Patent number 3,328,968
    • Issue date Jul 4, 1967
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3324664
    • Patent number 3,324,664
    • Issue date Jun 13, 1967
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents