TREA

Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH

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Patents Grantslast 30 patents

  • Information Patent Grant

    Sealing arrangement for heat treatment apparatus
    • Patent number 5,193,998
    • Issue date Mar 16, 1993
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Robert Hack
    • C21 - METALLURGY OF IRON
  • Information Patent Grant

    Apparatus for detecting gaseous discharge in vacuum furnaces
    • Patent number 5,193,100
    • Issue date Mar 9, 1993
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Robert Hack
    • F27 - FURNACES KILNS OVENS RETORTS
  • Information Patent Grant

    Pump with drive motor
    • Patent number 5,088,899
    • Issue date Feb 18, 1992
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Armin Blecker
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Position sensor
    • Patent number 5,070,264
    • Issue date Dec 3, 1991
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Armin Conrad
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Multi-chamber vacuum installation
    • Patent number 5,054,748
    • Issue date Oct 8, 1991
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Gerhard Hild
    • C21 - METALLURGY OF IRON
  • Information Patent Grant

    Pump for conveying gases and providing a differential pressure
    • Patent number 5,017,106
    • Issue date May 21, 1991
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Kurt Holss
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Multi-stage molecular pump
    • Patent number 4,893,985
    • Issue date Jan 16, 1990
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Kurt Holss
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Heat treatment of materials
    • Patent number 4,850,576
    • Issue date Jul 25, 1989
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Robert Hack
    • B22 - CASTING POWDER METALLURGY
  • Information Patent Grant

    Pumps
    • Patent number 4,832,564
    • Issue date May 23, 1989
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Kurt Holss
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vacuum pump
    • Patent number 4,826,394
    • Issue date May 2, 1989
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Heinrich Lotz
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Apparatus for treating workpieces with hot gases including gas dist...
    • Patent number 4,818,223
    • Issue date Apr 4, 1989
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Gerhard Hild
    • F27 - FURNACES KILNS OVENS RETORTS
  • Information Patent Grant

    Method of producing biological specimens
    • Patent number 4,784,873
    • Issue date Nov 15, 1988
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Wilhelm Kienecker
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
  • Information Patent Grant

    Discs with blades
    • Patent number 4,770,574
    • Issue date Sep 13, 1988
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Heinrich Lotz
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Treating metals and/or metallic compounds
    • Patent number 4,708,190
    • Issue date Nov 24, 1987
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Robert Hack
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Pump with magnetic bearings
    • Patent number 4,541,772
    • Issue date Sep 17, 1985
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Willi Becker
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Electric motor drive arrangement
    • Patent number 4,520,296
    • Issue date May 28, 1985
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Eberhard Lepper
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Two stage rotary vane pump
    • Patent number 4,508,494
    • Issue date Apr 2, 1985
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Erich Bachmann
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Turbo-molecular pump
    • Patent number 4,502,832
    • Issue date Mar 5, 1985
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Willi Becker
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Rotary piston pump with pressure equalization chambers for the shaf...
    • Patent number 4,465,442
    • Issue date Aug 14, 1984
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Hermann Lang
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Apparatus for heating and drying articles
    • Patent number 4,424,633
    • Issue date Jan 10, 1984
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Karl-Heinz Bernhardt
    • F26 - DRYING
  • Information Patent Grant

    Vacuum condensation apparatus
    • Patent number 4,423,766
    • Issue date Jan 3, 1984
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Karl-Heinz Bernhardt
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Method of and apparatus for measuring the rate of leak
    • Patent number 4,320,653
    • Issue date Mar 23, 1982
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Karl-Heinz Bernhardt
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Vacuum pump assembly with built-in shutoff valve
    • Patent number 4,193,742
    • Issue date Mar 18, 1980
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Klaus Fischer
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Turbomolecular pump with magnetic mounting
    • Patent number 4,111,595
    • Issue date Sep 5, 1978
    • Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    • Willi Becker
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...