Patent ID: 7217217

Claim:
A torque transmission differential for an automobile comprising a case selectively rotated around an axis Y–Y′, a drive wheel axle shaft having axis Y–Y′, a gear train situated inside the case and which transmits the rotational movement of the case to the drive wheel axle shaft, and a muzzle joined with the case and interposed between the gear train and an internal surface of the case, the gear train including a pair of coaxial conical spider gears mounted on a pin connected with the case and having an axis Z–Z′ perpendicular to axis Y–Y′, and a pair of conical side gears having an axis Y–Y′ which are joined to the drive wheel axle shaft and which mesh with spider gears, the gear train generally lying within an ellipsoid of revolution, and the muzzle having a general shape of an ellipsoidal zone generated by the revolution, concentric with respect to the gear train, wherein the muzzle has at least a first pair of shims.