Patent ID: 6915873

Claim:
An agricultural tractor comprising: an engine; a transmission driven by the engine a drive axle driven by the transmission, the drive axle including a central housing having left and right drive output members, left and right axle housings movably coupled to the central housing for vertical movement of the left and right axle housings relative to the central housing, left and right axle shafts rotatably carried by the left and right axle housings and left and right universal joints drivingly coupling the left and right drive output members to the left and right axle shafts respectively, the universal joint comprising a drive yoke at an outboard end of the drive outout member, the drive yoke defining an outboard face, a first journal member coupled to the drive yoke for pivotal motion about a first joint pivot axis transverse to a longitudinal axis of the drive output member, the first joint pivot axis being inboard of the drive yoke outboard face, a coupling yoke joined to the first journal member for pivotal motion about a second joint pivot axis transverse to the longitudinal axis of the drive output member and transverse to the first joint pivot axis, a driven yoke at an inboard end of the axle shaft, the driven yoke defining an inboard face, a second journal member coupled to the second yoke for pivotal motion about a third joint pivot axis transverse to a longitudinal axis of the axle shaft, the third joint pivot axis being outboard of the driven yoke inboard face, and the second journal member being joined to the coupling yoke for pivotal motion about a fourth joint pivot axis transverse to the longitudinal axis of the axle shaft and transverse to the third joint pivot axis; and left and right wheel and tire assemblies coupled to the left and right axle shafts respectively.