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:
May. 03, 2022
Filed:
Apr. 28, 2020
Jtekt Corporation, Osaka, JP;
University Public Corporation Osaka, Osaka, JP;
Tatsuma Kouchi, Kashiwara, JP;
Tomoyuki Takei, Nara, JP;
Kunio Ohara, Osaka, JP;
Hiroki Tanaka, Kashihara, JP;
Osamu Ishikawa, Osaka, JP;
JTEKT CORPORATION, Osaka, JP;
UNIVERSITY PUBLIC CORPORATION OSAKA, Osaka, JP;
Abstract
A thermoacoustic device includes a loop tube in which a working gas is sealed; a stack in which a temperature gradient is generated in a tube axis direction of the loop tube, the stack being provided in the loop tube; and a diaphragm structure including a diaphragm provided in the loop tube and an operation unit, the diaphragm having a surface extending in a direction intersecting the tube axis direction and being configured to vibrate with a component of vibration in the tube axis direction, and the operation unit being configured to apply a physical quantity that is required, to the diaphragm to change a rigidity of the diaphragm in the tube axis direction.