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. 23, 1976
Filed:
Apr. 07, 1975
Milton M Kosfeld, Colts Neck, NJ (US);
Fedders Corporation, Edison, NJ (US);
Abstract
Liquid refrigerant is injected into the high-pressure side of a rotary compressor so as to cool the refrigerant being compressed to allow it to be useful in cooling the compressor motor. The injection port is located on the bottom face of the compressor chamber, within an area removed from the compressor chamber wall, immediately adjacent the compressor chamber discharge. The feed to the injection port is through a larger tube containing two non-connected capillaries, the first capillary being connected to the inlet of the tube and the second capillary being connected to the injection port. In this manner, a column of liquid remains in the second capillary. The combination of the placement of the injection port and the form of the inlet tubing to the injection port prevents liquid from being carried over into the suction side of the compressor, where efficiency and economy would be diminished, avoids the necessity for a check valve in the suction line to the compressor chamber, and allows for the parts of the compressor chamber to be used with varying compressor rollers without remachining.