Controlled steering differential with external brakes

Claim 1

A STEERING DIFFERENTIAL MECHANISM COMPRISING A HOUSING, DIFFERENTIAL CARRIER ROTATABLY JOURNALLED WITHIN SAID HOUSING, POWER INPUT SHAFT, A DRIVING CONNECTION BETWEEN SAID POWER INPUT SHAFT AND SAID CARRIER, A PAIR OF DIFFERENTIAL PINIONS HAVING FIRST GEARED PORTIONS MESHING WITH EACH OTHER, SAID PINIONS BEING SUPPORTED ROTATABLY WITHIN SAID CARRIER, A PAIR OF DIFFERENTIAL SIDE GEARS WITHIN SAID CARRIER, SEPARATE POWER OUTPUT SHAFTS CONNECTED TO SAID SIDE GEARS AND MOUNTED FOR ROTATION ABOUT THE AXIS OF ROTATION OF SAID CARRIER, ONE PINION HAVING A SECOND GEARED PORTION IN MESHING ENGAGEMENT WITH ONE SIDE GEAR AND A CORRESPONDING SECOND GEARED PORTION OF THE OTHER PINION BEING SITUATED IN MESHING ENGAGEMENT WITH THE OTHER SIDE GEAR, A SEPARATE SLEEVE SHAFT SURROUNDING EACH POWER OUTPUT SHAFT, A STEERING GEAR CARRIED BY EACH SLEEVE SHAFT WITHIN SAID CARRIER, A GEARED CONNECTION BETWEEN EACH STEERING GEAR AND A SEPARATE ONE OF SAID PINIONS, AND BRAKE DISC CONNECTED TO SAID SLEEVE SHAFT AND ROTATABLY SUPPORTED BY SAID HOUSING ON THE EXTERIOR THEREOF WHEREBY CONTROLLED GEARED STEERING MAY BE ACCOMPLISHED, THE FIRST GEARED PORTION OF EACH DIFFERENTIAL PINION BEING OF A PITCH DIAMETER THAT IS GREATER THAN THE PITCH DIAMETER OF THE SECOND GEARED PORTION THEREOF, EACH GEARED PORTION BEING CARRIED BY A COMMON PINION SHAFT, AND PINION BEARING MEANS FOR END SUPPORTING SAID SHAFTS WITHIN SAID CARRIER.