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:
Feb. 02, 1993
Filed:
May. 26, 1992
Kenneth W Manz, Paulding, OH (US);
Christopher M Powers, Bryan; both of, OH (US);
SPX Corporation, Muskegon, MI (US);
Abstract
A refrigerant recovery system that includes a refrigerant accumulator having an inlet port for connection to the liquid port of equipment from which refrigerant is to be recovered, a vapor outlet port and a liquid outlet port. The liquid outlet port of the accumulator is connected to the inlet of a liquid refrigerant pump, which has an outlet for connection to a refrigerant storage container. A valve is responsive to pressure differential between the liquid refrigerant pump and the accumulator for operatively connecting the accumulator vapor outlet port to the inlet of a compressor. Thus, operation of the compressor functions to draw refrigerant from the equipment under service into the accumulator by reducing pressure within the accumulator, while the liquid pump operates to pump liquid refrigerant collected with the accumulator directly to the refrigerant storage container bypassing the compressor. The valve limits pressure differential across the liquid pump.