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:
Feb. 07, 2012
Filed:
Jun. 25, 2007
Klaus-peter Neitzke, Bremen, DE;
Andreas Ulrich, Bremen, DE;
Klaus-Peter Neitzke, Bremen, DE;
Andreas Ulrich, Bremen, DE;
Airbus Deutschland GmbH, Hamburg, DE;
Abstract
Apparatus for adjusting pitch angle of propeller blades of a variable-pitch propeller. The blades being adjustable in a first blade pitch-angle range with positive pitch angles, in a second blade pitch-angle range, and in a third blade pitch-angle range with negative pitch angles. The second blade pitch-angle range is an intermediate range located between the first and the third blade pitch-angle range, which includes the pitch-angle range where blade drag is a minimum, and ranges of positive pitch angles with low thrust and of negative pitch angles with low reverse thrust. The apparatus provides adjustment of the propeller blades from the first to the third blade pitch-angle range and vice versa, and is designed to be operated so that at least a first group of propeller blades can be rotated through the second blade pitch-angle range, while propeller blades in another group are in a positive blade pitch-angle range.