TREA

Means counteracting entry of dirt Built-in cleaning devices

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  • CPC
  • E21D15/15
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Parent Industries

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

Current Industry

E21D15/15Means counteracting entry of dirt Built-in cleaning devices
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Patents Grantslast 30 patents

  • Information Patent Grant

    Sleeve holder for a hydraulic cylinder
    • Patent number 10,385,888
    • Issue date Aug 20, 2019
    • Caterpillar Global Mining Europe GmbH
    • Christian Knoblich
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Hydraulic cylinder
    • Patent number 6,615,705
    • Issue date Sep 9, 2003
    • DBT GmbH
    • Werner Reinelt
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    3791151
    • Patent number 3,791,151
    • Issue date Feb 12, 1974
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    3073562
    • Patent number 3,073,562
    • Issue date Jan 15, 1963
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    3001808
    • Patent number 3,001,808
    • Issue date Sep 26, 1961
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2915019
    • Patent number 2,915,019
    • Issue date Dec 1, 1959
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    2713773
    • Patent number 2,713,773
    • Issue date Jul 26, 1955
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2691503
    • Patent number 2,691,503
    • Issue date Oct 12, 1954
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2686649
    • Patent number 2,686,649
    • Issue date Aug 17, 1954
    • E04 - BUILDING
  • Information Patent Grant

    2641514
    • Patent number 2,641,514
    • Issue date Jun 9, 1953
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    2618122
    • Patent number 2,618,122
    • Issue date Nov 18, 1952
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    2290507
    • Patent number 2,290,507
    • Issue date Jul 21, 1942
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    1919156
    • Patent number 1,919,156
    • Issue date Jul 18, 1933
    • B66 - HOISTING LIFTING HAULING

Patents Applicationslast 30 patents

  • Information Patent Application

    Hydraulic cylinder
    • Publication number 20020046650
    • Publication date Apr 25, 2002
    • Werner Reinelt
    • E21 - EARTH DRILLING MINING