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:
Apr. 16, 2013
Filed:
Feb. 04, 2009
Kazuhiro Furusho, Sakai, JP;
Yoshitaka Shibamoto, Sakai, JP;
Takashi Shimizu, Sakai, JP;
Takazou Sotojima, Sakai, JP;
Kazuhiro Furusho, Sakai, JP;
Yoshitaka Shibamoto, Sakai, JP;
Takashi Shimizu, Sakai, JP;
Takazou Sotojima, Sakai, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
A compressor includes a compression mechanism having lower and upper stage compression chambers. Refrigerant compressed in the lower-stage compression chamber is further compressed in the higher-stage compression chamber. An intermediate injection pipe is arranged to inject refrigerant between the lower-stage and the higher-stage compression chambers. The compression mechanism includes at least one fixed member having a fixed end plate, and at least one movable member having a movable end plate section facing the fixed end plate with at least one of the compression chambers interposed between the end plate sections. At least one intermediate back pressure chamber is formed to face a back surface of the movable end plate section. The intermediate back pressure chamber communicates with a discharge side of the lower-stage compression chamber, and is arranged such that internal pressure of the intermediate back pressure chamber acts on the movable end plate section.