Abstract: A universal joint for drivably and flexibly coupling two shafts together. The universal includes a pair of body members for being removably connected to the shafts, a pair of arm members connected to and extending from each body member and connected to each other to form an interlocking relationship with the pair of arms extending from the other body member, an inner bearing seat member enclosed by the arm members and a plurality of spherical bearings operatively mounted in the seats formed by concavities in the inner seat member and concavities in the arm members. The individual elements of the joint may be disassembled, repaired or replaced without disconnecting the joint from the shafts and using only simple tools.

Abstract: A disc apparatus for forming levees used in rice farming and the like. The disc apparatus includes a longitudinal frame member onto which a pair of cross frame members are pivotally attached. A set of disc blades consisting of a plurality of disc blade members are attached to the opposite ends of each cross frame member. Each disc blade member of a set are of varying outside diameters with the disc blade member having the largest outside diameter located closest to the longitudinal frame member and with the size of each adjacent disc blade member uniformly decreasing so that the disc blade member having the smallest outside diameter will be located farthest from the longitudinal frame member. Each set of disc blade members can be adjusted so that the lowermost portion of each blade member thereof is level with the lowermost portion of each of the other blade members of that set.