US Patent Issued to Pratt & Whitney Canada on July 21 for "Variable-speed epicyclic gearbox for an aircraft propulsion system" (Canadian Inventors)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,687,226, issued on July 21, was assigned to Pratt & Whitney Canada Corp. (Longueuil, Canada).

"Variable-speed epicyclic gearbox for an aircraft propulsion system" was invented by Dave Menheere (Norval, Canada) and Russell Stratton (Toronto).

According to the abstract* released by the U.S. Patent & Trademark Office: "An aircraft propulsion system includes a gearbox including an input shaft, an output shaft, an epicyclic gear arrangement, a drive gear, a layshaft assembly, and a rotational control device. The epicyclic gear arrangement includes a sun gear, planet gears, a ring gear, and a carrier. The sun gear is connected with the drive gear. The planet gears are engaged with the sun ...