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. 15, 2003
Filed:
Jul. 17, 2002
Hiroshi Sekiya, Ota, JP;
Takahiro Nakamura, Ota, JP;
Itsuo Nakazaki, Ota, JP;
Takashi Inoue, Oizumi-machi, JP;
Ryousuke Tuihiji, Gunma-Ken, JP;
Takeo Komatsubara, Kiryu, JP;
Hiroshi Kanai, Ota, JP;
Kazuya Sato, Oizumi-machi, JP;
Takayuki Mizuno, Ashikaga, JP;
Eiji Fukuda, Oizumi-machi, JP;
Yasuo Sakamoto, Oizumi-machi, JP;
Hiroshi Nishikawa, Tatebaya, JP;
Denji Mashimo, Oizumi-machi, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A Stirling refrigerator, which prevents oil rising, makes oil seal bellows have long-life, and includes a housing, cylinder, piston, piston rod and an oil seal bellows. The oil seal bellows seals a space between the housing and the cylinder, wherein a tip end of the oil seal bellows is sealed and fixed on the piston or on the piston rod inside the cylinder, and a base end of the oil seal bellows is installed on the housing. The oil seal bellows reciprocates with a stroke, wherein the tip end of the oil seal bellows is compressed to a compression side from a position of free length then returns to the position of free length.