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provided with essential hydraulic devices

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  • CPC
  • E21D23/006
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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

E21D23/006provided with essential hydraulic devices
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Distributed coal cutting device for longwall face of coal mine
    • Patent number 12,049,824
    • Issue date Jul 30, 2024
    • Ruifu Yuan
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Method and device for monitoring operation of a mining machine unit
    • Patent number 11,746,655
    • Issue date Sep 5, 2023
    • Caterpillar Inc.
    • Euan Kirkhope
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Magnetically controlled material-based magnetorheological pilot ope...
    • Patent number 11,480,263
    • Issue date Oct 25, 2022
    • Shandong University of Science and Technology
    • Chenglong Wang
    • E21 - EARTH DRILLING MINING
  • 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

    Longwall optimization control
    • Patent number 10,208,592
    • Issue date Feb 19, 2019
    • Joy Global Underground Mining LLC
    • Gareth Rimmington
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic assembly for a mining system
    • Patent number 9,982,799
    • Issue date May 29, 2018
    • Caterpillar Global Mining Europe GmbH
    • James Hassell
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Float-swing hydraulic support
    • Patent number 9,926,784
    • Issue date Mar 27, 2018
    • China University of Mining and Technology
    • Bingwen Li
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Prop head bearing device for shield supports
    • Patent number 9,458,716
    • Issue date Oct 4, 2016
    • Caterpillar Global Mining Europe GmbH
    • Swetlana Horn
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    3889481
    • Patent number 3,889,481
    • Issue date Jun 17, 1975
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3754129
    • Patent number 3,754,129
    • Issue date Aug 21, 1973
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3631681
    • Patent number 3,631,681
    • Issue date Jan 4, 1972
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3592011
    • Patent number 3,592,011
    • Issue date Jul 13, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3592063
    • Patent number 3,592,063
    • Issue date Jul 13, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3583287
    • Patent number 3,583,287
    • Issue date Jun 8, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3563094
    • Patent number 3,563,094
    • Issue date Feb 16, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3543640
    • Patent number 3,543,640
    • Issue date Dec 1, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3531162
    • Patent number 3,531,162
    • Issue date Sep 29, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3523424
    • Patent number 3,523,424
    • Issue date Aug 11, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3517815
    • Patent number 3,517,815
    • Issue date Jun 30, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3503302
    • Patent number 3,503,302
    • Issue date Mar 31, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3500719
    • Patent number 3,500,719
    • Issue date Mar 17, 1970
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    3490243
    • Patent number 3,490,243
    • Issue date Jan 20, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3490244
    • Patent number 3,490,244
    • Issue date Jan 20, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3482407
    • Patent number 3,482,407
    • Issue date Dec 9, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3478522
    • Patent number 3,478,522
    • Issue date Nov 18, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3453935
    • Patent number 3,453,935
    • Issue date Jul 8, 1969
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    3448584
    • Patent number 3,448,584
    • Issue date Jun 10, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3437011
    • Patent number 3,437,011
    • Issue date Apr 8, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3437010
    • Patent number 3,437,010
    • Issue date Apr 8, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3435620
    • Patent number 3,435,620
    • Issue date Apr 1, 1969
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents