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:
Mar. 20, 2001
Filed:
Oct. 05, 1999
Walter D. Murray, Pioneer, OH (US);
William C. Brown, Bryan, OH (US);
SPX Corporation, Muskegon, MI (US);
Abstract
A flow control system allows sampling of refrigerant from a refrigerant recovery inlet of the system or, alternatively, the refrigerant recovery tank. Refrigerant selected from either source is metered and oil is filtered therefrom to provide a clean vapor refrigerant sample to a refrigerant identification detector. Oil separated from the refrigerant is returned to the oil drain of the main system for collection. In a preferred embodiment, a first conduit having a pressure control valve is coupled from a refrigerant inlet to the refrigerant recovery and recharging system. A check valve, a metering orifice, and an oil separator is coupled in the first conduit and to a refrigerant identification detector. The system includes a second conduit coupled to the main refrigerant recovery tank through a solenoid valve also communicating with the orifice and oil separator, with the valves being selectively operable for sampling either incoming refrigerant to the recovery and recharging system from the refrigerant circuit under service or from the recovery tank of the servicing instrument itself. A third conduit couples the collected oil from the oil separator through a check valve and control solenoid to the oil recovery system of the recovery and recharging unit.