The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 16, 1995
Filed:
Apr. 14, 1994
John T Bertva, Colleyville, TX (US);
Danny A Wheeler, Fort Worth, TX (US);
Other;
Abstract
A method for recovering original type oil from a system that has been charged with an original type refrigerant eliminates the need for removing and cleaning individual components. A separate oil separator is connected to the compressor suction of the air conditioning system. The air conditioning system is operated to collect oil in the oil separator. Then the oil separator is bypassed and the system is injected with a replacement oil. The system is again operated, with the replacement oil mixing with the original type oil. The oil separator is again reconnected into the system at the suction port of the compressor. The air conditioning system operates again, with the oil being collected a second time. The system is then ready for recovery of refrigerant by a recovery unit.