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Vacuum pump having emergency bearings
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Patent number 5,059,092
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Issue date Oct 22, 1991
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Leybold Aktiengesellschaft
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Hans-Peter Kabelitz
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Pump stage for a high-vacuum pump
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Patent number 4,978,276
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Issue date Dec 18, 1990
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Leybold Aktiengesellschaft
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Hans-Peter Kabelitz
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Method of making a dual-shaft machine
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Patent number 4,974,318
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Issue date Dec 4, 1990
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Leybold Aktiengesellschaft
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Josef Heppekausen
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Lubricating oil feed system
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Patent number 4,915,194
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Issue date Apr 10, 1990
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Leybold-Heraeus GmbH
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Heinrich Englander
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Shaft seal
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Patent number 4,128,248
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Issue date Dec 5, 1978
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Leybold-Heraeus GmbH & Co. KG
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Hans-Peter Kabelitz
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...