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:
Oct. 20, 2009
Filed:
Mar. 23, 2005
Yoshiaki Watanabe, Kyoto, JP;
Shinichi Sakamoto, Osaka, JP;
Yoshiaki Watanabe, Kyoto, JP;
Shinichi Sakamoto, Osaka, JP;
The Doshisha, Kyoto-shi, JP;
Abstract
In order to reduce the time until an acoustic wave is generated and perform heat exchange smoothly in a stack, a thermoacoustic apparatusincludes a first stacksandwiched between a first high-temperature-side heat exchangerand a first low-temperature-side heat exchangerand a second stacksandwiched between a second high-temperature-side heat exchangerand a second low-temperature-side heat exchangerin the inside of a loop tube, wherein a standing wave and a traveling wave are generated through self excitation by heating the first high-temperature-side heat exchanger, the second low-temperature-side heat exchangeris cooled by the standing wave and the traveling wave, or/and a standing wave and a traveling wave are generated by cooling the first low-temperature-side heat exchanger, and the second high-temperature-side heat exchangeris heated by the standing wave and the traveling wave. The standing wave and the traveling wave are generated in the state in which helium having a high sound velocity, a small Prandtl number, and a small specific gravity is enclosed in the loop tube and, thereafter, argon having a low sound velocity, a large Prandtl number, and a small specific gravity is injected.