STAL Refrigeration AB

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5108269 Method of controlling a rotary compressorExpiredJul 05, 89Apr 28, 92[F04C]
5044909 Valve device for control of the inner volume relation in a screw type rotary compressorExpiredMar 07, 90Sep 03, 91[F04C]
4932844 Control section for a control system for controlling the internal volume of a rotary compressorExpiredOct 07, 88Jun 12, 90[F16K, F04B]
4877380 Control system for controlling the internal volume in a rotary compressorExpiredMar 02, 88Oct 31, 89[F04B, F04C]
4845954 Method and device for the manufacture of an ice slurryExpiredJun 07, 88Jul 11, 89[F25B]
4746277 Rotary compressor with pressure pulse suppressionExpiredJan 29, 87May 24, 88[F04B, F04C]
4741177 Oil separator in a coolant systemExpiredJan 29, 87May 03, 88[F25B]
4737082 Lift valve for rotary screw compressorsExpiredJan 28, 87Apr 12, 88[F04B, F01C]
4720250 Regulator for cooling or heat pump systemsExpiredNov 26, 86Jan 19, 88[F04B, F01C]
4684330 Drive for rotary compressorExpiredAug 24, 81Aug 04, 87[F04B]
4618272 Device for fixing a thrust bearingExpiredJan 16, 86Oct 21, 86[F16B, F16C, F16D]
4565508 Device for controlling the volumetric capacity of a screw compressorExpiredOct 23, 84Jan 21, 86[F01C]
4488858 Compressor with radial inlet to screw-formed rotorExpiredAug 30, 82Dec 18, 84[F04C]
4474019 Method of recirculating oil in refrigerating systemsExpiredDec 14, 82Oct 02, 84[F25B]
4362472 Rotary compressor with variable built-in volume ratioExpiredJun 09, 80Dec 07, 82[F04B]
4315410 Method and apparatus for making ice blocksExpiredMay 12, 80Feb 16, 82[F25C]
4239467 Rotary compressor with valved liquid injection through the rotorExpiredOct 12, 78Dec 16, 80[F04C]
4229949 Refrigeration systemExpiredJan 31, 79Oct 28, 80[F25B]
4227755 Bearing arrangement for shaft of rotary compressorExpiredOct 19, 78Oct 14, 80[F16C]
4224014 Rotary compressor with liquid injectionExpiredOct 12, 78Sep 23, 80[F04C]

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