Patent ID: 8307925

Claim:
A hybrid power driving system, comprising: a first subsystem configured to receive power and transmit power; a second subsystem configured to receive power and transmit power; a driving shaft configured to receive power from the first subsystem and/or the second subsystem and provide output power to the first subsystem and/or the second subsystem; a tri-state overrunning clutch configured to operatively couple the first subsystem and the second subsystem, wherein the overrunning clutch is configured to be in an overrun state, an engaged state, or a disengaged state; and the tri-state overrunning clutch having an outer race with a plurality of arcuate recesses, an inner race, and a plurality of wedges disposed between the outer race and the inner race, the wedges configured to pivot between the arcuate recesses of the outer race and the inner race to provide the overrun state, the engaged state, and the disengaged state.