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. 19, 2003
Applicants:
Ingo Udo Borchers, Uhldingen-Muehlhofen, DE;
Sigurd Haeusler, Uhldingen-Muehlhofen, DE;
Michael Bauer, Immenstaad, DE;
Roger Drobietz, Salem, DE;
Wolfgang Gleine, Kakenstorf, DE;
Inventors:
Ingo Udo Borchers, Uhldingen-Muehlhofen, DE;
Sigurd Haeusler, Uhldingen-Muehlhofen, DE;
Michael Bauer, Immenstaad, DE;
Roger Drobietz, Salem, DE;
Wolfgang Gleine, Kakenstorf, DE;
Assignee:
Dornier GmbH, Friedrichshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B64C011/50 ;
U.S. Cl.
CPC ...
Abstract
A process and system for noise reduction in multi-engine propeller-driven aircraft. The parameters of at least two propellers are adjusted with regard to frequency, amplitude, and phase so that the sound fields of the propellers are attenuated or completely extinguished by interference in the area of the closest aircraft fuselage.