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:
Nov. 30, 2004
Filed:
Aug. 22, 2003
Kenzo Matsumoto, Oizumi-machi, JP;
Kazuaki Fujiwara, Ota, JP;
Haruhisa Yamasaki, Oizumi-machi, JP;
Yoshio Watabe, Ojima-machi, JP;
Kentaro Yamaguchi, Oizumi-machi, JP;
Noriyuki Tsuda, Oizumi-machi, JP;
Masaji Yamanaka, Tatebayashi, JP;
Kazuya Sato, Oizumi-machi, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A multi-stage compression type rotary compressor is provided with an electrical-power element , the first and second rotary compression elements driven by a rotary shaft of the electrical-power element in a sealed vessel . The refrigerant compressed by the first rotary compression element is compressed by the second rotary compression element . The refrigerant is combustible. The refrigerant compressed by the first rotary compression element is discharged to the sealed vessel . The discharged medium pressure refrigerant is compressed by the second rotary compression element . Additionally, the displacement volume ratio of the second rotary compression element to the first rotary compression element is set not less than 60% and not more than 90%. By using the multi-stage compression type rotary compressor, a rotary compressor using a combustible refrigerant can be carried out.