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. 07, 2025
Filed:
Jun. 30, 2023
Mann+hummel Filter (Shanghai) Co., Ltd., Shanghai, CN;
Kaizhuan Wang, Shanghai, CN;
Yimin Ni, Shanghai, CN;
MANN+HUMMEL FILTER (SHANGHAI) CO., LTD., Shanghai, CN;
Abstract
A broadband muffler for a fuel cell vehicle includes a first housing, a second housing connected to the first housing to form a sealed cavity, and an inner cannula disposed in the seal cavity and dividing the sealed cavity into chambers, the inner cannula comprising square or rectangular openings through a surface of the inner cannula in a first one of the chambers, the inner cannula comprising round holes through the surface of the inner cannula in a different one of the chambers, the square or rectangular openings and the round holes being for reducing noise. The broadband muffler further includes a water collection tank disposed in the second housing, a venturi tube connected to an exhaust port of the inner cannula, and a drainage tube disposed at a center of the venturi tube and connected to the water collection tank.