Decoupler assemblies for engine starter

An air turbine starter for starting an engine, comprising:

• a housing defining an inlet, an outlet, and a flow path extending between the inlet and the outlet for communicating a flow of gas there through;
• a turbine member journaled within the housing and disposed within the flow path for rotatably extracting mechanical power from the flow of gas;
• a gear train drivingly coupled with the turbine member;
• a drive shaft operably coupled with the gear train, the drive shaft having an output end, and ramped teeth on the output end and
• a decoupler, comprising:
• an output shaft having a first end and a second end, the first end comprising ramped teeth suitable for mating with the ramped teeth of the drive shaft, the output shaft configured to be selectively operably coupled to the drive shaft, the second end of the output shaft configured to be operably coupled to and rotate with the engine, wherein the ramped teeth of each of the drive shaft and the output shaft enable driving torque transfer from the drive shaft to the output shaft, and wherein the ramped teeth of each of the drive shaft and the output shaft are capable of sliding on each other when back driving torque is transmitted such that the output shaft is moved away from the drive shaft;
• a first connector having a body with a first end and a second end and extending between the output shaft and the drive shaft;
• and
• a magnetic coupling capable of selectively linking the drive shaft to the output shaft via the first connector, wherein when driving torque is transmitted the first connector is magnetically linked to one of the output shaft or the drive shaft via the magnetic coupling and when back driving torque is transmitted the first connector is moved away from at least a portion of the magnetic coupling.