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:
Aug. 25, 2015
Filed:
Sep. 24, 2012
Daikin Industries, Ltd., Osaka-shi, Osaka, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
A rotary compressor includes a drive mechanism having a drive shaft with an eccentric part, and a compression mechanism. The compression mechanism includes a tubular cylinder covering an outer periphery of the eccentric part, a piston arranged inside the cylinder and fitted onto the eccentric part, an upper end plate closing an upper end of the cylinder, and a lower end plate closing a lower end of the cylinder. A lower end surface of the eccentric part defines a thrust bearing surface slidably contacting an upper end surface of the lower end plate. The drive shaft has an oil path with lubrication oil circulating through the oil path. The eccentric part has a circumferentially extending pressure reduction groove opening at part of the thrust bearing surface close to an inner circumferential side to reduce a pressure of the lubrication oil supplied from the oil path to the pressure reduction groove.