|
| US3974659 | 16 avr. 1975 | 17 août 1976 | | Oil sampling and charging method and apparatus for refrigeration systems |
| US4178765 | 28 juin 1978 | 18 déc. 1979 | General Electric Company | Means for causing the accumulation of refrigerant in a closed system |
| US4282717 | 19 nov. 1979 | 11 août 1981 | | Oil separator and heat exchanger for vapor compression refrigeration system |
| US4506519 | 24 août 1983 | 26 mars 1985 | Tecumseh Products Company | Hermetic compressor discharge line thermal block |
| US4800736 | 27 janv. 1988 | 31 janv. 1989 | | Heat pump |
| US5377501 | 20 nov. 1992 | 3 janv. 1995 | Environmental Products Amalgamated Pty Ltd | Oil separator for conditioning recovered refrigerant |
| US5444988 | 19 sept. 1994 | 29 août 1995 | | Closed loop oil charging for ac or refrigerant compressor units |
| US5461883 | 26 janv. 1994 | 31 oct. 1995 | Hitachi, Ltd. | Compression refrigerating machine |