Ralf Steffens

Person

Lorach, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Spindle compressor using refrigerant cooling for housing and rotor
- Patent number 10,337,515
- Issue date Jul 2, 2019
- Ralf Steffens
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Displacement pump with internal compression
- Patent number 8,876,506
- Issue date Nov 4, 2014
- Ralf Steffens
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Cooled screw-type vacuum pump
- Patent number 7,056,108
- Issue date Jun 6, 2006
- Leybold Vakuum GmbH
- Manfred Behling
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Drive mechanism for a screw pump
- Patent number 6,666,672
- Issue date Dec 23, 2003
- Ralf Steffens
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Dry-compressing screw pump having cooling medium through hollow rot...
- Patent number 6,497,563
- Issue date Dec 24, 2002
- Ralf Steffens
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Screw compressor with cooling
- Patent number 5,924,855
- Issue date Jul 20, 1999
- SIHI Industry Consult GmbH
- Christian Dahmlos
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Vacuum pump
- Patent number 5,904,473
- Issue date May 18, 1999
- SIHI Industry Consult GmbH
- Christian Dahmlos
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Displacement machine with electronic motor synchronization
- Patent number 5,767,635
- Issue date Jun 16, 1998
- Sihi GmbH & Co. KG
- Ralf Steffens
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Rotor profile for a Roots vacuum pump
- Patent number 5,152,684
- Issue date Oct 6, 1992
- Leybold Aktiengesellschaft
- Ralf Steffens
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Double-shaft vacuum pump with synchronization gears
- Patent number 5,035,590
- Issue date Jul 30, 1991
- Leybold Aktiengesellschaft
- Ralf Steffens
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Multistage rotary piston vacuum pump having sleeves to fix shaft po...
- Patent number 4,983,107
- Issue date Jan 8, 1991
- Leybold Aktiengesellschaft
- Ralf Steffens
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Method of making a dual-shaft machine
- Patent number 4,974,318
- Issue date Dec 4, 1990
- Leybold Aktiengesellschaft
- Josef Heppekausen
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Twin-shaft, multiple-stage vacuum pump with the shafts vertically d...
- Patent number 4,940,398
- Issue date Jul 10, 1990
- Leybold Aktiengesellschaft
- Hanns-Peter Berges
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Bearing support for a twin-shaft pump
- Patent number 4,917,583
- Issue date Apr 17, 1990
- Leybold Aktiengesellschaft
- Heinz Frings
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Lubricating oil feed system
- Patent number 4,915,194
- Issue date Apr 10, 1990
- Leybold-Heraeus GmbH
- Heinrich Englander
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

Information Patent Application
STEAM COMPRESSOR COMPRISING A DRY POSITIVE-DISPLACEMENT UNIT AS A S...
- Publication number 20200386228
- Publication date Dec 10, 2020
- Ralf Steffens
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
DISPLACEMENT COMPRESSOR SYSTEM FOR R-718
- Publication number 20200309129
- Publication date Oct 1, 2020
- Ralf Steffens
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
COMPRESSION REFRIGERATION MACHINE HAVING A SPINDLE COMPRESSOR
- Publication number 20170089342
- Publication date Mar 30, 2017
- Ralf Steffens
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
SPINDLE COMPRESSOR
- Publication number 20150118093
- Publication date Apr 30, 2015
- Ralf Steffens
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
Displacement Pump with Internal Compression
- Publication number 20120171068
- Publication date Jul 5, 2012
- Ralf Steffens
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
Cooled screw-type vacuum pump
- Publication number 20040265160
- Publication date Dec 30, 2004
- Manfred Behling
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
Profiled contour of a screw pump
- Publication number 20040111884
- Publication date Jun 17, 2004
- Ralf Steffens
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Ralf Steffens

Person

Patents Grantslast 30 patents

Spindle compressor using refrigerant cooling for housing and rotor

Displacement pump with internal compression

Cooled screw-type vacuum pump

Drive mechanism for a screw pump

Dry-compressing screw pump having cooling medium through hollow rot...

Screw compressor with cooling

Vacuum pump

Displacement machine with electronic motor synchronization

Rotor profile for a Roots vacuum pump

Double-shaft vacuum pump with synchronization gears

Multistage rotary piston vacuum pump having sleeves to fix shaft po...

Method of making a dual-shaft machine

Twin-shaft, multiple-stage vacuum pump with the shafts vertically d...

Bearing support for a twin-shaft pump

Lubricating oil feed system

Patents Applicationslast 30 patents

STEAM COMPRESSOR COMPRISING A DRY POSITIVE-DISPLACEMENT UNIT AS A S...

DISPLACEMENT COMPRESSOR SYSTEM FOR R-718

COMPRESSION REFRIGERATION MACHINE HAVING A SPINDLE COMPRESSOR

SPINDLE COMPRESSOR

Displacement Pump with Internal Compression

Cooled screw-type vacuum pump

Profiled contour of a screw pump