US 12,031,452 B2
Airfoil with body and cover panel
Eric W. Malmborg, Amston, CT (US); and Larry Foster, South Glastonbury, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RAYTHEON TECHNOLOGIES CORPORATION, Farmington, CT (US)
Filed on Dec. 22, 2022, as Appl. No. 18/087,412.
Application 17/529,392 is a division of application No. 16/251,537, filed on Jan. 18, 2019, granted, now 11,203,936, issued on Dec. 21, 2021.
Application 18/087,412 is a continuation of application No. 17/529,392, filed on Nov. 18, 2021, granted, now 11,536,142.
Prior Publication US 2023/0304407 A1, Sep. 28, 2023
Int. Cl. F01D 5/14 (2006.01); F16B 5/06 (2006.01); F16B 13/00 (2006.01); F16B 13/02 (2006.01)
CPC F01D 5/147 (2013.01) [F05D 2230/64 (2013.01); F05D 2240/301 (2013.01); F05D 2250/33 (2013.01); F05D 2260/31 (2013.01); F05D 2300/603 (2013.01); F16B 5/0657 (2013.01); F16B 2013/007 (2013.01); F16B 13/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An airfoil comprising:
a metal body having holes;
a cover panel carried on the metal body; and
push fasteners extending through the cover panel and into the holes to lock the cover panel on the metal body, each of the push fasteners including flexible barbs that engage sides of the holes to resist retraction of the fasteners from the holes, and the push fasteners including heads that are embedded in recesses in the cover panel wherein sides of the recesses are obliquely sloped with respect to a length direction of the fasteners.