TREA

comprising a pair of joined struts

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Industry

  • CPC
  • E21D23/0008
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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

E21D23/0008comprising a pair of joined struts
Industries

Patents Grantslast 30 patents

  • 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

    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 4,030,308
    • Issue date Jun 21, 1977
    • Fletcher Sutcliffe Wild Limited
    • Philip Dudley
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    FLOAT-SWING HYDRAULIC SUPPORT
    • Publication number 20170260859
    • Publication date Sep 14, 2017
    • CHINA UNIVERSITY OF MINING AND TECHNOLOGY
    • Bingwen LI
    • E21 - EARTH DRILLING MINING