ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,742,459, issued on Sept. 22, was assigned to PRATT & WHITNEY CANADA CORP. (Longueuil, Canada).
"Compressor shroud with swept grooves" was invented by Feng Shi (Mississauga, Canada), Jason Nichols (Mississauga, Canada) and Hong Yu (Oakville, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A compressor for an aircraft engine. A rotor includes blades rotatable about an axis. Blade tips extend between leading and trailing edges. A shroud surrounds the rotor, with an inner surface surrounding the tips. Grooves are defined in the shroud inner surface adjacent the tips. The grooves extend circumferentially about the shroud and radially from inlet openin...