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:
Jul. 21, 2009
Filed:
Mar. 14, 2005
Masazumi Sakaniwa, Gunma, JP;
Akira Hashimoto, Gunma, JP;
Masayuki Hara, Gunma, JP;
Takahiro Nishikawa, Gunma, JP;
Hirotsugu Ogasawara, Gunma, JP;
Akihiro Suda, Gunma, JP;
Masazumi Sakaniwa, Gunma, JP;
Akira Hashimoto, Gunma, JP;
Masayuki Hara, Gunma, JP;
Takahiro Nishikawa, Gunma, JP;
Hirotsugu Ogasawara, Gunma, JP;
Akihiro Suda, Gunma, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A compressor includes two rotary compressing elements in a vessel. One of the compressing elements operates while the other element is in a non-operating mode. In the non-operating mode, inflow of refrigerant gas into the cylinder of the rotary compressing element is blocked and a suction side pressure of the rotary compressing element is applied as a back pressure to a vane. A compressing system includes the compressor and a controller and operates in first and second operation modes. In the first operation mode, refrigerant gas flows into a cylinder and an intermediate pressure, a result of flow of the refrigerant gas from between a vane and a guide groove into a back pressure portion, between a suction side pressure and a discharge side pressure, is applied as a back pressure to bias the vane against a roller.