Patent ID: 7827875

Claim:
A gyro precessional automatic transmission comprising a planetary gear unit wherein a planet shaft functions as a gyroscope by adding a certain inertia moment thereto, thereby power being transmitted and wherein revolution of the planet shaft becomes a precession of itself due to an output load, thereby speed spontaneously varying with changes in the output load; the planetary gear unit is a bevel gear assembly with a plurality of planet shafts wherein in operation, the precession centers of the planet shafts are focused on a single point along the axis extended between input and output shafts, and further comprising an automatic critical torque clutch whereby, if the output load is below a prescribed limit, the front and rear shafts of the transmission are connected, thus the whole of the transmission becoming a single shaft and a direct connection drive being made and whereby, if the output load exceeds a prescribed limit, the connected shafts are disconnected, thus the rotors going into precession and gear ratio spontaneously varying with changes in the output load.