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Walter Weirich

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  • Dortmund, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Balanced hydraulic valve devices
    • Patent number 5,157,947
    • Issue date Oct 27, 1992
    • Gewerkschaft Eisenhutte Westfalia GmbH
    • Walter Weirich
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Arrangement for emergency operation of hydraulic appliance in an el...
    • Patent number 5,060,556
    • Issue date Oct 29, 1991
    • Gewerkschaft Eisenhutte Westfalia GmbH
    • Walter Weirich
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Pressure-relief valve devices
    • Patent number 4,790,347
    • Issue date Dec 13, 1988
    • Gewerkschaft Eisenhutte Westfalia GmbH
    • Walter Weirich
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Multi-part roof-contacting structures of mine roof supports
    • Patent number 4,755,084
    • Issue date Jul 5, 1988
    • Gewerkschaft Eisenhutte Westfalia GmbH
    • Bernd Peters
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Distributor
    • Patent number 4,737,052
    • Issue date Apr 12, 1988
    • Gewerkschaft Eisenhutte Westfalia GmbH
    • Walter Weirich
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Distributors for pressure fluid control system in mineral mining in...
    • Patent number 4,718,458
    • Issue date Jan 12, 1988
    • Gewerkschaft Eisenhutte Westfalia GmbH
    • Walter Weirich
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Pressure-relief valve devices
    • Patent number 4,716,928
    • Issue date Jan 5, 1988
    • Gewerkschaft Eisenhutte Westfalia GmbH
    • Willy Kussel
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Control of the actuation of hydraulic consumers
    • Patent number 4,702,148
    • Issue date Oct 27, 1987
    • Gewerkschaft Eisenhutte Westfalia GmbH
    • Willy Kussel
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Hydraulic control arrangement
    • Patent number 4,613,257
    • Issue date Sep 23, 1986
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Control apparatus
    • Patent number 4,572,709
    • Issue date Feb 25, 1986
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support unit having dust suppression means
    • Patent number 4,552,487
    • Issue date Nov 12, 1985
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic coupling device
    • Patent number 4,544,185
    • Issue date Oct 1, 1985
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hydraulic control devices for use with mining apparatus
    • Patent number 4,537,221
    • Issue date Aug 27, 1985
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Connecting devices for use with pneumatic or hydraulic hoses
    • Patent number 4,536,017
    • Issue date Aug 20, 1985
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hydraulic connecting device
    • Patent number 4,534,584
    • Issue date Aug 13, 1985
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Mine roof supports
    • Patent number 4,534,681
    • Issue date Aug 13, 1985
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic coupling
    • Patent number 4,493,340
    • Issue date Jan 15, 1985
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Control systems for mineral mining installations
    • Patent number 4,451,181
    • Issue date May 29, 1984
    • Gewerkschaft Eisenhutte Westfalia
    • Thomas Trumper
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Control apparatus
    • Patent number 4,443,135
    • Issue date Apr 17, 1984
    • Gewerkschaft Eisenhutte Westfalia
    • Klaus Beckmann
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic control arrangement for a roof support unit of a mineral...
    • Patent number 4,440,522
    • Issue date Apr 3, 1984
    • Gewerkschaft Eisenhutte Westfalia
    • Michael Dettmers
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mineral mining installation
    • Patent number 4,427,321
    • Issue date Jan 24, 1984
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof supports
    • Patent number 4,422,807
    • Issue date Dec 27, 1983
    • Gewerkschaft Eisenhutte Westfalia
    • Michael Dettmers
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Actuator for a mine roof support unit
    • Patent number 4,394,875
    • Issue date Jul 26, 1983
    • Gewerkschaft Eisenhutte Westfalla
    • Walter Weirich
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic control systems for mining apparatus
    • Patent number 4,391,181
    • Issue date Jul 5, 1983
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic control systems for and methods of controlling the operat...
    • Patent number 4,391,553
    • Issue date Jul 5, 1983
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Control unit for an electro-hydraulic roof support control arrangement
    • Patent number 4,378,027
    • Issue date Mar 29, 1983
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic coupling device
    • Patent number 4,378,124
    • Issue date Mar 29, 1983
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hydraulic roof support control system
    • Patent number 4,327,628
    • Issue date May 4, 1982
    • Gewerkschaft Eisenhutte Westialia
    • Walter Weirich
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mineral mining installation
    • Patent number 4,325,659
    • Issue date Apr 20, 1982
    • Gewerkschaft Eisenhutte Westfalia
    • Lubomir Plevak
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hydraulic coupling device
    • Patent number 4,319,772
    • Issue date Mar 16, 1982
    • Gewerkschaft Eisenhutte Westfalia
    • Walter Weirich
    • E21 - EARTH DRILLING MINING