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. 24, 2005
Filed:
Mar. 26, 2002
Hemant S. Shah, Livonia, MI (US);
John Stuart Hollingshead, Dearborn, MI (US);
John Wang, Ann Arbor, MI (US);
Prakash Tuljaram Thawani, Bloomfield Hills, MI (US);
Richard Charles Kosik, Plymouth, MI (US);
Mukesh Kumar, Canton, MI (US);
Hemant S. Shah, Livonia, MI (US);
John Stuart Hollingshead, Dearborn, MI (US);
John Wang, Ann Arbor, MI (US);
Prakash Tuljaram Thawani, Bloomfield Hills, MI (US);
Richard Charles Kosik, Plymouth, MI (US);
Mukesh Kumar, Canton, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
The present invention is a system and method to significantly reduce noise associated with air-moving devices such as an axial flow fan using a fan shroud and barrel combination with built in silencers such as Helmholtz resonators. The invention can be applied to a variety of applications such as a thermal management system for a fuel cell powered vehicle. The resonator can be a hollow cavity in networks attached to an outer or inner barrel or shroud and tuned to reduce noise at predetermined noise frequency ranges within the airflow. The invention can also attach stator members on the inner surface of the outer barrel to further reduce noise. Additional sound absorbing material, such as steel wool, can be disposed within the resonator cavity.