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. 17, 2009
Filed:
Dec. 14, 2006
Kenzo Matsumoto, Gunma-ken, JP;
Hiroyuki Matsumori, Gunma-ken, JP;
Takashi Sato, Kumagaya, JP;
Takayasu Saito, Kumagaya, JP;
Kenzo Matsumoto, Gunma-ken, JP;
Hiroyuki Matsumori, Gunma-ken, JP;
Takashi Sato, Kumagaya, JP;
Takayasu Saito, Kumagaya, JP;
Sanyo Electric Co., Ltd., Moriguchi-shi, JP;
Abstract
An object is to provide a high inner pressure type multistage compression rotary compressor capable of avoiding beforehand generation of vane fly of a second rotary compression element and realizing a stabilized operation, the rotary compressor includes a communication path which connects an intermediate pressure region to a region having a low pressure as a suction pressure of a first rotary compression element; and a valve device which opens or closes this communication path, the rotary compressor applies a high pressure as a back pressure of an upper vane, and this valve device opens the communication path in a case where a pressure difference between the intermediate pressure and the low pressure increases a predetermined upper limit value before the intermediate pressure reaches the high pressure.