ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,533, issued on May 20, was assigned to PRATT & WHITNEY CANADA CORP. (Longueuil, Canada).
"Turbine rotor dovetail structure with splines" was invented by Francis Gemme (Sainte-Julie, Canada), Othmane Leghzaouni (Boucherville, Canada), Robert Huszar (Saint-Bruno-de-Montarville, Canada) and Daniel Lecuyer (St-Bruno, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fir tree structure is provided and includes a part extending radially inwardly from a rotating part and having an inward taper. The part has a spline profile forming fixing lobes and necks, which are interleaved with the fixing lobes. The spline profile has constantly changing radii of...