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:
Dec. 02, 2008
Filed:
Feb. 15, 2007
Kazuo Iwata, Yokohama, JP;
Takeyoshi Shimbori, Yokohama, JP;
Koichiro Yamada, Yokohama, JP;
Noritoshi Takamura, Yokohama, JP;
Kazuo Iwata, Yokohama, JP;
Takeyoshi Shimbori, Yokohama, JP;
Koichiro Yamada, Yokohama, JP;
Noritoshi Takamura, Yokohama, JP;
NHK Spring Co., Ltd., Yokohama-shi, JP;
Abstract
A bellows unit and a compression coil spring are located in series with each other between a first member and a second member. The bellows unit has an inner bellows, an outer bellows, and first and second end members. A sealed space is defined in the bellows unit. A compressed gas is sealed in the sealed space. The bellows unit is caused to extend and contract in the direction of an axis by the compressed gas. The sealed space contains an uncompressible liquid that can exchange heat with the gas. The liquid is an example of a heat exchange material.