| US 7,520,733 B2 | ||
| Multistage compression type rotary compressor | ||
| Kenzo Matumoto, Ora-Gun (Japan); Haruhisa Yamasaki, Ora-Gun (Japan); Kazuya Sato, Ora-Gun (Japan); Masaya Tadano, Nitta-Gun (Japan); Satoshi Imai, Ota (Japan); Akira Sugawara, Kumagaya (Japan); and Takashi Sato, Kumagaya (Japan) | ||
| Assigned to Sanyo Electric Co., Ltd., Moriguchi-Shi (Japan) | ||
| Filed on Nov. 04, 2005, as Appl. No. 11/266,257. | ||
| Application 11/266257 is a division of application No. 10/454636, filed on Jun. 05, 2003, granted, now 7,131,821. | ||
| Claims priority of application No. 2002-164735 (JP), filed on Jun. 05, 2002; application No. 2002-166410 (JP), filed on Jun. 07, 2002; application No. 2002-167253 (JP), filed on Jun. 07, 2002; application No. 2002-167271 (JP), filed on Jun. 07, 2002; application No. 2002-176494 (JP), filed on Jun. 18, 2002; application No. 2002-177941 (JP), filed on Jun. 19, 2002; and application No. 2002-185802 (JP), filed on Jun. 26, 2002. | ||
| Prior Publication US 2006/0056982 A1, Mar. 16, 2006 | ||
| Int. Cl. F04B 17/03 (2006.01); F04C 11/00 (2006.01) | ||
| U.S. Cl. 417—410.3 [418/11; 418/249] | 5 Claims |
| 1. A multistage compression type rotary compressor comprising an electric element in a hermetic shell case, and first and
second rotary compression elements being driven by the electric element, wherein refrigerant compressed by said first rotary
compression element is compressed by the said second rotary compression element:
wherein the refrigerant compressed by the second rotary compression element is discharged into the hermetic shell case, and
a high pressure refrigerant in the hermetic shell case is discharged outside, further comprising a refrigerant introduction
pipe for introducing refrigerant discharaed from the first rotary compression element into the second rotary compression element
through an outside of the hermetic shell case.
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