US Patent Issued to RTX on March 18 for "Transmission and method for control of boost spool" (Arizona, Connecticut Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,021, issued on March 18, was assigned to RTX Corp. (Farmington, Conn.).

"Transmission and method for control of boost spool" was invented by Paul R. Hanrahan (Sedona, Ariz.) and Daniel B. Kupratis (Wallingford, Conn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A gas turbine engine includes a first spool, a second spool, a third spool, and a epicyclic differential. The epicyclic differential includes a sun gear, planet gears supported from a planet carrier, a ring gear, and a locking member, each housed within an accessory gearbox. The planet carrier couples to the second spool. The sun gear couples to the third spool, and the ring gear couples t...