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:
Sep. 26, 2017
Filed:
Sep. 14, 2015
Ngk Insulators, Ltd., Nagoya, JP;
Yukio Miyairi, Nagoya, JP;
Shinichi Miwa, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A heat/acoustic wave conversion component includes a partition wall that defines a plurality of cells extending from a first end face to a second end face and mutually converts heat exchanged between the partition wall and the working fluid and energy of acoustic waves resulting from oscillations of the working fluid. Hydraulic diameter HD of the heat/acoustic wave conversion component is 0.4 mm or less, where the hydraulic diameter HD is defined as HD=4×S/C, where S denotes an area of a cross-section of each cell perpendicular to the cell extending direction and C denotes a perimeter of the cross section. The heat/acoustic wave conversion component has an open frontal area at each end face of 60% or more and 93% or less. The partition wall has arithmetic surface roughness (Ra) at the surface of 3 μm or more and 20 μm or less.