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with advancing shifting devices connected therewith

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  • CPC
  • E21D23/0073
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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

E21D23/0073with advancing shifting devices connected therewith
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

    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

    3889986
    • Patent number 3,889,986
    • Issue date Jun 17, 1975
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3872678
    • Patent number 3,872,678
    • Issue date Mar 25, 1975
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3857246
    • Patent number 3,857,246
    • Issue date Dec 31, 1974
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3821880
    • Patent number 3,821,880
    • Issue date Jul 2, 1974
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3724329
    • Patent number 3,724,329
    • Issue date Apr 3, 1973
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3672176
    • Patent number 3,672,176
    • Issue date Jun 27, 1972
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3664138
    • Patent number 3,664,138
    • Issue date May 23, 1972
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3606758
    • Patent number 3,606,758
    • Issue date Sep 21, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3601998
    • Patent number 3,601,998
    • Issue date Aug 31, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3439508
    • Patent number 3,439,508
    • Issue date Apr 22, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3395616
    • Patent number 3,395,616
    • Issue date Aug 6, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3381586
    • Patent number 3,381,586
    • Issue date May 7, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3376707
    • Patent number 3,376,707
    • Issue date Apr 9, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3333424
    • Patent number 3,333,424
    • Issue date Aug 1, 1967
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3302529
    • Patent number 3,302,529
    • Issue date Feb 7, 1967
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3228300
    • Patent number 3,228,300
    • Issue date Jan 11, 1966
    • 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

    3217603
    • Patent number 3,217,603
    • Issue date Nov 16, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3217498
    • Patent number 3,217,498
    • Issue date Nov 16, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3216201
    • Patent number 3,216,201
    • Issue date Nov 9, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3192722
    • Patent number 3,192,722
    • Issue date Jul 6, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3186178
    • Patent number 3,186,178
    • Issue date Jun 1, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

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

    3143862
    • Patent number 3,143,862
    • Issue date Aug 11, 1964
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2910281
    • Patent number 2,910,281
    • Issue date Oct 27, 1959
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2861429
    • Patent number 2,861,429
    • Issue date Nov 25, 1958
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2795934
    • Patent number 2,795,934
    • Issue date Jun 18, 1957
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2756034
    • Patent number 2,756,034
    • Issue date Jul 24, 1956
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents