Patent ID: 9316159
Filing Date: 2016-04-19
CPC Classification: F02C

Claim Text:
1. A gas turbine engine comprising: at least one turbine rotor drivingly engaged to an engine spool; a transmission having a rotatable first member coupled to the spool, a rotatable second member, and rotatable coupled members defining at least first and second alternate transmission paths between the first and second members, each transmission path being defined by the coupled members of the respective one of the transmission paths and defining a different fixed transmission ratio of a rotational speed of the second member on a rotational speed of the first member; an actuation mechanism having at least first and second positions, the actuation mechanism in each position drivingly engaging the first and second members to the coupled members of a single respective one of the transmission paths, the actuation mechanism in each position including at least one brake removably engaged with and preventing rotation of one of the coupled members of the respective one of the transmission paths; and at least one compressor rotor coupled to the second member.