TREA

Shield operating devices; Hinges therefor

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  • CPC
  • E21D23/0427
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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

E21D23/0427Shield operating devices; Hinges therefor
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Patents Grantslast 30 patents

  • Information Patent Grant

    Self-moving tunnel support canopy
    • Patent number 9,291,053
    • Issue date Mar 22, 2016
    • Xinbin Li
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mining roof support
    • Patent number 5,685,669
    • Issue date Nov 11, 1997
    • Fabryka Maszyn"Glinik" S.A.
    • Tadeusz Lewinski
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Roof supports
    • Patent number 4,828,433
    • Issue date May 9, 1989
    • Gewerkschaft Eisenhutte Westfalia GmbH
    • Egon Wojaczek
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof supports
    • Patent number 4,792,261
    • Issue date Dec 20, 1988
    • Gullick Dobson Limited
    • Tom C. Bithell
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof supports
    • Patent number 4,732,511
    • Issue date Mar 22, 1988
    • Dowty Mining Equipment Ltd.
    • Dennis F. Rutherford
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Shield supports suitable for use in mines
    • Patent number 4,629,368
    • Issue date Dec 16, 1986
    • Dowty Mining Equipment Limited
    • Nigel Hill
    • 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

    Shield supports suitable for use in mines
    • Patent number 4,607,986
    • Issue date Aug 26, 1986
    • Dowty Mining Equipment Limited
    • Stephen A. Brown
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof supports
    • Patent number 4,563,111
    • Issue date Jan 7, 1986
    • Dobson Park Industries PLC.
    • James Seddon
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof supports
    • Patent number 4,518,284
    • Issue date May 21, 1985
    • Gewerkschaft Eisenhutte Westfalia
    • Kunibert Becker
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic mine-roof support
    • Patent number 4,474,510
    • Issue date Oct 2, 1984
    • Hermann Hemscheidt Maschinenfabrik GmbH & Co.
    • Hans Bull
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof supporting structure
    • Patent number 4,299,517
    • Issue date Nov 10, 1981
    • Voest-Alpine Aktiengesellschaft
    • Gottfried Siebenhofer
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support structure
    • Patent number 4,293,246
    • Issue date Oct 6, 1981
    • Klockner-Werke AG
    • Werner Boer
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support
    • Patent number 4,252,477
    • Issue date Feb 24, 1981
    • Bochumer Eisenhutte Heintzmann GmbH & Co
    • Alfred Bollmann
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Shield timbering frame for timbering mines
    • Patent number 4,236,850
    • Issue date Dec 2, 1980
    • Thyssen Industrie AG
    • Manfred Koppers
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Shield type support for use in underground mining with lemniscate g...
    • Patent number 4,231,684
    • Issue date Nov 4, 1980
    • Thyssen Industrie AG
    • Harry Oppenlander
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Shield-carrying roof support unit
    • Patent number 4,197,035
    • Issue date Apr 8, 1980
    • Vereinigte Osterreichische Eisen- und Stahlwerke - Alpine Montan Aktiengesell...
    • Gottfried Siebenhofer
    • 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

    Hydraulic walking roof-support frame
    • Patent number 4,155,675
    • Issue date May 22, 1979
    • Hermann Hemscheidt Maschinenfabrik GmbH & Co.
    • Hans-Otto Friedrichs
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof supports
    • Patent number 4,139,326
    • Issue date Feb 13, 1979
    • Fletcher Sutcliffe Wild Limited
    • Lewis R. Bower
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Canopy and shield structure for a supporting shield in a seam-like...
    • Patent number 4,136,999
    • Issue date Jan 30, 1979
    • Thyssen Industrie AG
    • Manfred Koppers
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support
    • Patent number 4,132,081
    • Issue date Jan 2, 1979
    • Dowty Mining Equipment Limited
    • John H. Walker
    • 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

    Shield tubbing for longwalls
    • Patent number 4,085,592
    • Issue date Apr 25, 1978
    • Rheinstahl AG
    • Werner Dahlem
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Support assemblies for use in mine workings
    • Patent number 4,048,804
    • Issue date Sep 20, 1977
    • Gewerkschaft Eisenhutte Westfalia
    • Burckhardt Elsner
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support
    • Patent number 4,037,419
    • Issue date Jul 26, 1977
    • Dowty Mining Equipment Limited
    • Nigel Hill
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Shield structure
    • Patent number 4,020,640
    • Issue date May 3, 1977
    • Vereinigte Osterreichische Eisen- und Stahlwerke-Alpine Montan Aktiengesellsc...
    • Siegfried Sigott
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine support assemblies
    • Patent number 3,971,225
    • Issue date Jul 27, 1976
    • Becorit Grubenausbau GmbH
    • Wilhelm Wertelewski
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Excavation-roof support
    • Patent number 3,959,976
    • Issue date Jun 1, 1976
    • Bochumer Eisenhutte Heintzmann & Company
    • Gunter Blumenthal
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support
    • Patent number 3,932,998
    • Issue date Jan 20, 1976
    • Becorit Grubenausbau GmbH
    • Walter Lubojatsky
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents