Patent ID: 7690469

Claim:
A four-wheel drive system comprising: a front transaxle; a rear transaxle; a transmission receiving drive power from a prime mover, and having an output shaft; and a bi-directional overrunning clutch drivingly coupled to the output shaft of the transmission and selectively coupled to the front transaxle and rear transaxle, wherein the bi-directional overrunning clutch includes, an input gear drivingly coupled to the output shaft of the transmission, a roller assembly, disposed within the input gear, including a roll cage, and a spring extending from the roll cage, a first hub located at least partially within the roller assembly and selectively coupled with an end of a forward shaft segment, wherein the forward shaft segment delivers torque to the front transaxle, a second hub located at least partially within the roller assembly and coupled with an end of a rearward shaft segment, wherein the rearward shaft segment delivers torque to the rear transaxle, and a friction member disposed adjacent the roller assembly and at least one of the hubs, wherein the spring exerts a force on the friction member, thereby creating a frictional engagement between the roller assembly and the hub.