US 12,129,024 B2
Fan apparatus with lift fan and louvered cover
Michael J. Duffy, Saint Charles, MO (US); Oliver Daniel Ensslin, Lucerne (CH); and Emanuele Marano, Bern (CH)
Assigned to Aurora Flight Sciences Corporation, a subsidiary of The Boeing Company, Manassas, VA (US); and The Boeing Company, Arlington, VA (US)
Filed by Aurora Flight Sciences Corporation, a subsidiary of The Boeing Company, Manassas, VA (US); and The Boeing Company, Chicago, IL (US)
Filed on Dec. 17, 2021, as Appl. No. 17/555,299.
Claims priority of provisional application 63/127,938, filed on Dec. 18, 2020.
Prior Publication US 2022/0194575 A1, Jun. 23, 2022
Int. Cl. B64C 29/00 (2006.01); B64C 3/38 (2006.01); B64C 21/02 (2006.01); F02K 1/00 (2006.01)
CPC B64C 29/0025 (2013.01) [B64C 3/38 (2013.01); B64C 21/02 (2013.01); F02K 1/002 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fan apparatus, comprising:
a duct having an opening;
a lift fan mounted in the duct; and
a series of louvers positioned at the opening and each configured to move between an open position and a closed position, the louvers being offset from one another along a fore-to-aft axis; and
wherein each louver has a pivot axis, and each successive pivot axis is progressively closer to a trailing edge of the respective louver.