US Patent Issued to PRATT & WHITNEY CANADA on Feb. 3 for "Tie shaft for engine rotating assembly" (Canadian Inventors)

ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,550, issued on Feb. 3, was assigned to PRATT & WHITNEY CANADA CORP. (Longueuil, Canada).

"Tie shaft for engine rotating assembly" was invented by Philippe Savard (Terrebonne, Canada), Guy Lefebvre (St-Bruno, Canada) and Remy Synnott (St-Jean-sur-Richelieu, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "During a disassembly method, a nut is unthreaded from a tie shaft. Prior to the unthreading of the nut, the tie shaft is threaded into a first rotating structure, a second rotating structure is mounted to the first rotating structure by a first tight fit connection, a third rotating structure is mounted to the second rotating structure by a seco...