Temporary supports at the driving front

Industry

  • CPC
  • E21D23/0095
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Patents Grantslast 30 patents

  • Information Patent Grant

    Active temporary roof support apparatus

    • Patent number 10,815,781
    • Issue date Oct 27, 2020
    • Sandvik Intellectual Property AB
    • Thomas Galler
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Heading shield

    • Patent number 4,420,278
    • Issue date Dec 13, 1983
    • Dowty (South Africa) (Proprietary) Limited
    • Andrew J. Walker
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mining and bolting method and apparatus

    • Patent number 4,310,197
    • Issue date Jan 12, 1982
    • Lee-Norse Company
    • William E. McCracken
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mobile mine roof support system

    • Patent number 4,307,982
    • Issue date Dec 29, 1981
    • Mining Machinery Development Corp.
    • Robert C. Nelson
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Tunnel roof supporting apparatus

    • Patent number 4,269,547
    • Issue date May 26, 1981
    • John D. Harding
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Device for provisionally consolidating a gallery and suitable conso...

    • Patent number 4,263,005
    • Issue date Apr 21, 1981
    • Vereinigte Osterreichische Eisen-und Stahlwerke - Alphine Montan Aktiengesell...
    • Siegfried Sigott
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Underground mining machine having temporary roof support means and...

    • Patent number 4,199,193
    • Issue date Apr 22, 1980
    • Acme Machinery Company
    • Earl M. Damron
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support system

    • Patent number 4,143,991
    • Issue date Mar 13, 1979
    • Frank Stafford
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Rock excavating arched tunnel forming machine

    • Patent number 3,979,151
    • Issue date Sep 7, 1976
    • Coal Industry (Patents) Limited
    • Derek Plummer
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3902324

    • Patent number 3,902,324
    • Issue date Sep 2, 1975
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3890792

    • Patent number 3,890,792
    • Issue date Jun 24, 1975
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3877717

    • Patent number 3,877,717
    • Issue date Apr 15, 1975
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3823566

    • Patent number 3,823,566
    • Issue date Jul 16, 1974
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3811290

    • Patent number 3,811,290
    • Issue date May 21, 1974
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3621661

    • Patent number 3,621,661
    • Issue date Nov 23, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3138933

    • Patent number 3,138,933
    • Issue date Jun 30, 1964
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3115754

    • Patent number 3,115,754
    • Issue date Dec 31, 1963
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2795936

    • Patent number 2,795,936
    • Issue date Jun 18, 1957
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2795935

    • Patent number 2,795,935
    • Issue date Jun 18, 1957
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    ACTIVE TEMPORARY ROOF SUPPORT APPARATUS

    • Publication number 20190153863
    • Publication date May 23, 2019
    • Sandvik Intellectual Property AB
    • Thomas GALLER
    • E21 - EARTH DRILLING MINING