A refrigerant recovery processing and storage unit (RPSU) for removing and storing refrigerant from an air conditioning and refrigeration system (AC&R) is disclosed. The unit creates a pressure difference between the inlet and outlet side of the AC&R, and a pressurized motivating gas is delivered to...http://www.google.se/patents/US5024061?utm_source=gb-gplus-sharePatent US5024061 - Recovery processing and storage unit
