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:
Apr. 09, 2024
Filed:
Jan. 19, 2020
Citic Dicastal Co., Ltd, Qinhuangdao, CN;
Shiwen Xu, Qinhuangdao, CN;
Mingbo Chen, Qinhuangdao, CN;
Minglei Li, Qinhuangdao, CN;
Shaobing Huang, Qinhuangdao, CN;
Tiefeng Hu, Qinhuangdao, CN;
Shuwei Feng, Qinhuangdao, CN;
Dadong Wang, Qinhuangdao, CN;
Weidong Liu, Qinhuangdao, CN;
CITIC Dicastal Co., LTD, Qinhuangdao, CN;
Abstract
A sound absorber is configured as a rectangular hexahedral box and forms a porous double-layer Helmholtz resonance sound absorbing structure, at the same time, the sound absorber in the form of a box forms a structural resonance sound absorbing device itself, and the first-order natural mode frequency of the device is identical to that of a wheel air chamber. When the box-type sound absorbing structure is assembled in a wheel, double functions of absorbing acoustic resonance of the wheel air chamber under the organic combination of Helmholtz resonance sound absorption and structural resonance sound absorption can be realized.