GHH RAND SCHRAUBENKOMPRESSOREN GMBH

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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 641
 
  
 
F03C POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS 420
 
  
 
F01C ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES 227
 
  
 
F16C SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OF CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS 169
 
  
 
F16J PISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; SEALINGS149

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9828995 Compressor and oil drain systemOct 23, 14Nov 28, 17[F16C, F04C, F03C]
9803639 Sectional sealing system for rotary screw compressorDec 19, 14Oct 31, 17[F04C, F03C, F16J]
9091268 Three-stage screw compressorSep 14, 12Jul 28, 15[F04C, F01C]
8342829 Three-stage screw compressorJun 09, 06Jan 01, 13[F04C, F01C]
7713039 Helical screw compressor having a vented sealing arrangementJun 09, 06May 11, 10[F04C, F03C]
7690901 Helical screw compressor comprising a cooling jacketJun 09, 06Apr 06, 10[F04C]
6991440 Two-stage screw compressorSep 30, 03Jan 31, 06[F03C]
6287100 Sealing device on a shaft journal of a dry-running helical rotary compressorJul 18, 00Sep 11, 01[F04C, F16J]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2008/0286,129 Helical Screw CompressorAbandonedJun 09, 06Nov 20, 08[F04B]
6488488 Rotary helical screw-type compressor having an intake filter and mufflerExpiredSep 10, 01Dec 03, 02[F04C]
6416302 Rotary helical screw-type compressor having a thermally separated oil supply containerExpiredSep 10, 01Jul 09, 02[F04C]

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