Patent ID: 7227276

Claim:
A wind driven electric generator apparatus, comprising: wind-energy-reception means for receiving wind energy, wherein said wind-energy-reception means include a pair of counter-rotating propeller units placed back to back with each other, wind-energy-to-mechanical-energy conversion means, connected to said wind-energy-reception means, for converting wind energy into mechanical energy, wherein said wind-energy-to-mechanical-energy conversion means include a first power transmission system connected to said pair of counter-rotating propeller units, a second power transmission system connected to said first power transmission system, and a first transmission housing for housing said first power transmission system, mechanical-energy-to-electrical-energy conversion means, connected to said wind-energy-to-mechanical-energy conversion means, for converting mechanical energy into electrical energy, wherein said mechanical-energy-to-electrical-energy conversion means are connected to said second power transmission system, propeller unit orientation means, supported by said first transmission housing, for orienting said pair of counter-rotating propeller units with respect to wind that is sensed, and self-adjusting propeller blade angle adjustment means, supported by said pair of counter-rotating propeller units, for adjusting propeller blade angles in response to wind that is sensed.