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:
Jan. 12, 2010
Filed:
Nov. 29, 2006
Masahiro Hashizume, Osaka, JP;
Masahiro Hashizume, Osaka, JP;
Kyocera Mita Corporation, Osaka, JP;
Abstract
A silencing device disposed to the outside of a fanthat discharges air from the interior of a deviceto the outside. The silencing device includes a reflection plateprovided substantially normal to the rotation axisof the fan, and a right-angled parallelepiped shaped ductthat guides air from the fanto the outside of the device. The reflection plateis disposed at the other end of the duct, an air discharge slitis formed in at least one of the four sides of the reflection plate, and the distance from the fanto the reflection platesatisfies the relationship L=(λ/2)×n. n is a natural number, and λ is the wavelength of the maximum component from among the wavelength components that constitutes the sound generated by the fan