ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,897, issued on April 29, was assigned to PRATT & WHITNEY CANADA CORP. (Longueuil, Canada).
"Airfoil ribs for rotor blades" was invented by Paul Aitchison (Hamilton, Canada), Paul Stone (Guelph, Canada) and Dikran Mangardich (Richmond Hill, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rotor of an aircraft engine has a plurality of blades extending radially from a disc. At least one of the blades has an airfoil, a root and a tip. The airfoil has a crack-mitigating rib extending chordwise along the airfoil. The crack-mitigating rib is disposed radially closer to the root than to the tip."
The patent was filed on June 2, 2022, under Applicati...