SIHI GmbH & Co. KG

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F04C ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS 542
 
  
 
B01D SEPARATION 2132
 
  
 
F04B POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS 260
 
  
 
F04D NON-POSITIVE-DISPLACEMENT PUMPS173
 
  
 
F16C SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OF CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS 169
 
  
 
G05D SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES 183
 
  
 
H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS 186

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5800146 Liquid-ring gas pump with a silencing element in the discharge spaceJun 17, 97Sep 01, 98[F04C]
5775816 Bearing arrangementJun 06, 97Jul 07, 98[F16C]
5767635 Displacement machine with electronic motor synchronizationNov 21, 95Jun 16, 98[H02P, F04C, G05D]
5735674 Liquid-ring gas pumpOct 15, 96Apr 07, 98[F04C]
5549450 Centrifugal pump of the sectional-casing designMar 16, 95Aug 27, 96[F04D]
5509789 Liquid ring pump having a sheet metal working chamber casingSep 12, 94Apr 23, 96[F04B, F04C]
5489195 Liquid ring pump having a sheet metal valve plateSep 21, 94Feb 06, 96[F04B, F04C]
5456827 Compressor system having a device for continuous cleaning of the auxiliary or working liquidDec 03, 93Oct 10, 95[B01D]
5194074 Device for continuously purifying the waste gases from a vacuum unitAug 06, 91Mar 16, 93[B01D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4979875 Centrifugal pump for the delivery of hot liquidsExpiredApr 14, 89Dec 25, 90[F04D]
4710105 Liquid-ring compressor unitExpiredFeb 13, 86Dec 01, 87[F04C]
4685865 Liquid ring compressor having openings in housing for emptying liquid during stoppageExpiredJul 24, 85Aug 11, 87[F04C]
4634348 Liquid ring compressor having a passageway in discharge port for introducing airExpiredSep 30, 85Jan 06, 87[F04C]
4632649 Gas jet pumpExpiredJul 23, 85Dec 30, 86[F04F]
4390317 Self-priming centrifugal pump, in particular for conveying liquids in the vicinity of their boiling pointExpiredJul 31, 81Jun 28, 83[F04D]
4256436 Self-priming pumpExpiredDec 22, 78Mar 17, 81[F01D]
4230438 Rotary pump assemblyExpiredMay 02, 79Oct 28, 80[F04D]

Top Inventors for This Owner

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