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:
Jul. 15, 2014
Filed:
Jun. 23, 2010
Anthony Gerard, Plelan le Grand, FR;
Alain Berry, Sherbrooke, CA;
Patrice Masson, Sherbrooke, CA;
Yves Gervais, Poitiers, FR;
Michel Besombes, Levallois-Perret, FR;
Anthony Gerard, Plelan le Grand, FR;
Alain Berry, Sherbrooke, CA;
Patrice Masson, Sherbrooke, CA;
Yves Gervais, Poitiers, FR;
Michel Besombes, Levallois-Perret, FR;
Socpra—Sciences et Genie, S.E.C., Sherbrooke, CA;
Universite de Poitiers, Poitou, FR;
Centre National de la Recherche Scientifique, Paris, FR;
Abstract
A method and apparatus for reducing a selected tonal noise generated by a fan operating in a non-uniform flow by locating at least one obstruction in the non-uniform flow such that the at least one obstruction generates a noise that is out of phase with the selected tonal noise. The noise generated by the at least one obstruction interferes with the selected tonal noise, thus reducing the selected tonal noise. It is also contemplated to use additional obstructions to reduce other tonal noises generated by the fan.