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:
Nov. 22, 2011
Filed:
Aug. 20, 2008
Jayant Dahyabhai Patel, Lake Forrest, CA (US);
W. Forrest Frantz, Parkdale, OR (US);
Douglas Dean Maben, Snohomish, WA (US);
Clifford John Petersen, Irvine, CA (US);
David V. Algas, Riverside, CA (US);
Jayant Dahyabhai Patel, Lake Forrest, CA (US);
W. Forrest Frantz, Parkdale, OR (US);
Douglas Dean Maben, Snohomish, WA (US);
Clifford John Petersen, Irvine, CA (US);
David V. Algas, Riverside, CA (US);
The Boeing Company, Chicago, IL (US);
Abstract
Apparatus and methods described herein provide for the management of noise associated with a duct. A sound-dampening apparatus is provided consisting of a duct through which a fluid flows, such as an air duct. A flexuous cord is helically wound around the inner or outer surface of the duct at a pitch corresponding to a selected acoustical frequency range associated with the fluid flow through the duct.