US 11,719,246 B2
Epicyclic drive for gas turbine engine lubricant pump
David Barger, East Hartford, CT (US); and Joseph H. Polly, Tolland, CT (US)
Assigned to Raytheon Technologies Corporation, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Feb. 10, 2021, as Appl. No. 17/172,546.
Application 17/172,546 is a continuation of application No. 15/984,792, filed on May 21, 2018, granted, now 10,982,678.
Prior Publication US 2021/0190080 A1, Jun. 24, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. F04D 25/02 (2006.01); F01D 25/20 (2006.01); F02C 7/06 (2006.01); F02C 7/32 (2006.01); F16H 57/04 (2010.01)
CPC F04D 25/028 (2013.01) [F01D 25/20 (2013.01); F02C 7/06 (2013.01); F02C 7/32 (2013.01); F16H 57/0436 (2013.01); F05D 2260/40311 (2013.01); F05D 2260/98 (2013.01)] 19 Claims
OG exemplary drawing
 
14. A gas turbine engine comprising:
a fan drive turbine driving a fan rotor through a main gear reduction; and
a primary lubricant system for supplying lubricant to said main gear reduction, and an auxiliary oil pump for supplying oil to said main gear reduction, and an auxiliary pump gear train for driving said auxiliary pump when said fan rotor is rotating in either direction, said main gear reduction being separate from said auxiliary pump gear train; and
an input gear to rotate when said fan rotor rotates, and in a direction of rotation of said fan rotor and engages a first gear in said auxiliary pump gear train, said first gear having an outer peripheral envelope, wherein in either direction of rotation of the fan rotor, said first gear rotates a drive gear, said drive gear driving an auxiliary pump gear that rotates on an axis of rotation of the auxiliary pump, and said auxiliary pump gear being within said outer peripheral envelope.