Patent ID: 9611789
Date: 2017-04-04
CPC Classifications: F02C,F02K,F05D,F16H,Y02T

Claim:
1. A reduction gearbox for a gas turbine engine for reducing the rotational speed of a turbine output shaft and driving an engine output shaft, comprising a first gear reduction stage having an input gear adapted to be driven by the turbine output shaft about a longitudinal input axis, the input gear transferring power to drive laterally spaced apart input speed gears about at least one transversely extending gear axis, each said input speed gear engaging an output speed gear to form a main speed reduction gear set, each main speed reduction gear set being spaced laterally from the longitudinal input axis of the input gear on opposed sides thereof to define a transverse gap therebetween, the engaged input and output speed gears of the main speed reduction gear set performing a majority of the reduction in the rotational speed of the turbine output shaft.