TREA

of prop heads or feet

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Industry

  • CPC
  • E21D15/55
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D15/00Props Chocks

Current Industry

E21D15/55of prop heads or feet
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Base mechanism of single prop capable of being unloaded at reduced...
    • Patent number 10,895,154
    • Issue date Jan 19, 2021
    • China University of Mining and Technology
    • Qiang Zhang
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Adapter for a formwork support structure
    • Patent number 10,119,282
    • Issue date Nov 6, 2018
    • Form 700 Pty Ltd
    • Emilio Rosati
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Yieldable prop with yieldable insert
    • Patent number 9,995,140
    • Issue date Jun 12, 2018
    • FCI Holdings Delaware, Inc.
    • Dakota Faulkner
    • 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

    Mine support having a linearly moveable and/or pivoting end plate
    • Patent number 8,052,352
    • Issue date Nov 8, 2011
    • FCI Holdings Delaware, Inc.
    • Wallace Bolton
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine prop
    • Patent number 6,910,834
    • Issue date Jun 28, 2005
    • Burrell Mining Products, Inc.
    • William L. Harbaugh
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Compressible support column
    • Patent number 6,499,916
    • Issue date Dec 31, 2002
    • American Commercial Inc.
    • James E. Marianski
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Prop headboard
    • Patent number 5,658,099
    • Issue date Aug 19, 1997
    • HL & H Timber Products (Propreitary) Limited
    • Frans Roelof Petrus Pienaar
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Yieldable load support
    • Patent number 5,318,387
    • Issue date Jun 7, 1994
    • H L & H Timber Products (Proprietary) Limited
    • Frans R. P. Pienaar
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Preload headboard for an elongate prop
    • Patent number 5,288,178
    • Issue date Feb 22, 1994
    • HL&H Timber Products (PTY) Ltd.
    • Frans R. P. Pienaar
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Prop preloading apparatus
    • Patent number 5,149,228
    • Issue date Sep 22, 1992
    • HL&H Timber Products (Proprietary) Limited
    • Frans R. P. Pienaar
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3373551
    • Patent number 3,373,551
    • Issue date Mar 19, 1968
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    3372551
    • Patent number 3,372,551
    • Issue date Mar 12, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3220686
    • Patent number 3,220,686
    • Issue date Nov 30, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3188041
    • Patent number 3,188,041
    • Issue date Jun 8, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3119309
    • Patent number 3,119,309
    • Issue date Jan 28, 1964
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2959922
    • Patent number 2,959,922
    • Issue date Nov 15, 1960
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents