초록 ▼

An air turbine starter for use aboard aircraft includes a dual range power train and a clutch automatically shifting between the ranges according to the use being experienced by the starter. Main engine starts may be achieved more quickly, while ground check out of aircraft systems using the starter

An air turbine starter for use aboard aircraft includes a dual range power train and a clutch automatically shifting between the ranges according to the use being experienced by the starter. Main engine starts may be achieved more quickly, while ground check out of aircraft systems using the starter to power main engine accessory devices via the engine gear box may be performed with better power input to the accessories and improved efficiency.

대표청구항 ▼

A dual range air turbine starter comprising a housing defining an inlet, an outlet, and a flow path communicating said inlet with said outlet for conveying a flow of pressurized air therebetween, a turbine member journaled by said housing in said flow path extracting shaft power from said flow of pr

A dual range air turbine starter comprising a housing defining an inlet, an outlet, and a flow path communicating said inlet with said outlet for conveying a flow of pressurized air therebetween, a turbine member journaled by said housing in said flow path extracting shaft power from said flow of pressurized air, an output shaft for delivering said shaft power externally of said starter, and dual range power train means for drivingly coupling said turbine member with said output shaft, wherein said dual range power train means includes first ratio power train means drivingly connecting said turbine member with said output shaft, second ratio power train means having a ratio different than said first ratio power train means and also drivingly coupling said turbine member with said output shaft, and selectively engageable clutch means by its engagement and disengagement selecting one or the other of said first ratio and said second ratio power train means, further including a one-way overrunning clutch interposed in one of said first ratio power train means or in said second ratio power train means and permitting overrunning when the other of said power train means is selected for transmitting torque between said turbine member and said output shaft, and wherein both of said first ratio power train means and said second ratio power train means include a respective one way overrunning clutch.