VILTER MANUFACTURING CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4974422 Evaporative condenser with fogging nozzleExpiredMar 08, 90Dec 04, 90[F28D]
4945941 Means to reduce vibration in check valves and stop/check valves caused by pulsating low fluid flowExpiredMar 05, 90Aug 07, 90[F16K]
4923173 Seating seal means for disc-type valveExpiredOct 30, 89May 08, 90[F16K]
4906264 Oil separator for separating and collecting oil entrained in refrigerantExpiredSep 13, 89Mar 06, 90[B01D]
4887514 Oil separation and gas pressure equalizer means for reciprocating gas compressorExpiredNov 18, 88Dec 19, 89[F15P, F01B]
4865073 Liquid level control for refrigeration systemExpiredSep 14, 87Sep 12, 89[F16K]
4660384 Defrost apparatus for refrigeration system and method of operating sameExpiredApr 25, 86Apr 28, 87[F25B, F25D]
4634093 Mounting means for valve discExpiredOct 07, 85Jan 06, 87[F16K]
4611503 Means for removing bearing from crankshaftExpiredDec 24, 84Sep 16, 86[F16C, F16F]
4588359 Compressor capacity control apparatusExpiredDec 24, 84May 13, 86[F04B]
4571951 Electronic control for expansion valve in refrigeration systemExpiredDec 14, 84Feb 25, 86[F25B]
4567815 Connecting rod and bearing assembly thereforExpiredDec 04, 84Feb 04, 86[F16C, F01B]
4554799 Multi-stage gas compressor system and desuperheater means thereforExpiredOct 29, 84Nov 26, 85[F25B]
4551982 Ice-thickness sensing device in refrigeration systemExpiredNov 13, 84Nov 12, 85[G01K, G01B]
4516994 Apparatus for separating liquid droplets from gasExpiredApr 11, 84May 14, 85[B01D]
4512550 Sealing means for valve spindleExpiredJul 25, 83Apr 23, 85[F16K]
4507064 Rotary gas compressor having rolling pistonsExpiredJun 01, 82Mar 26, 85[F16K, F04C]
4497181 Means to measure, indicate and regulate thickness of ice layer in refrigeration systemExpiredJun 13, 83Feb 05, 85[G08B, F25C]
4484596 Means for securing valve disc to valve spindleExpiredJul 25, 83Nov 27, 84[F16K]
4450856 Means for releasably securing hand-wheel to valve spindleExpiredJul 25, 83May 29, 84[F16K]

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