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:
Mar. 04, 2014
Filed:
Feb. 13, 2009
Counter rotating fan design and variable blade row spacing optimization for low environmental impact
Applicants:
Matthew D. Moore, Everett, WA (US);
Kelly L. Boren, Marysville, WA (US);
Robin B. Langtry, Burien, WA (US);
Inventors:
Matthew D. Moore, Everett, WA (US);
Kelly L. Boren, Marysville, WA (US);
Robin B. Langtry, Burien, WA (US);
Assignee:
The Boeing Company, Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02C 7/36 (2006.01); B64D 35/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
An air vehicle propulsion system incorporates an engine core with a power shaft to drive an outer blade row. The power shaft extends through and is supported by a counter rotation transmission unit which drives an inner blade row in counter rotational motion to the outer blade row. The counter rotation transmission unit exchanges power from the engine core with the shaft. An actuator engages the shaft for translation from a first retracted position to a second extended position.