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:
Oct. 25, 2016
Filed:
May. 11, 2011
Ernst-christoph Krackhardt, Schenefeld, DE;
Christian Norbert Müller, Witzhave, DE;
Dierk Schröder, Selent, DE;
Ernst-Christoph Krackhardt, Schenefeld, DE;
Christian Norbert Müller, Witzhave, DE;
Dierk Schröder, Selent, DE;
SIEMENS AKTIENGESELLSCHAFT, Munich, DE;
Abstract
In the case of a variable-pitch propeller or repeller according to the invention, the pitch-adjusting device is arranged in the hub and formed in such a way that it allows only a numerically limited number of different blade pitches, preferably just two blade pitches, for which purpose the pitch-adjusting device comprises an electrical drive device, for moving the blades from a first blade pitch to a second of the numerically limited number of blade pitches, and an electrically actuable locking device, for locking the blades in the numerically limited number of different blade pitches.