Central-pillar assemblies for center-pivot irrigation apparatuses

In a self-propelled sprinkler irrigation apparatus including a vertical-axis center-pivot located at a central-pillar assembly site of the land tract to be irrigated, said central-pillar site including water delivery means comprising a water inflow-pipe and outflow-elbow means located loftily above the land tract and further including medial-piping therebetween, a generally horizontal lengthy water distributing conduit extending radially outwardly from the center-pivot and communicating with the outflow-elbow means and having a plurality of underlying traction supports, the central-pillar assembly below the outflow-elbow means including journal means to permit the lengthy water distributing conduit to rotate around said vertical-axis center-pivot, an electrical pathway including incoming powerline and outgoing electrical cable means including a plurality of parallel electrical conductors, said electrical pathway including commutation means at the central-pillar and comprising a rotatable armature and a non-rotatable brushes holder to prevent twisting of the electrical pathway as the lengthy water distributing conduit and associated cable means rotates around said vertical-axis, the improvement comprising:

• (a) a confluential vessel attached to and located below the central-pillar assembly journal means;
• (b) an upright tubular drive-conduit surrounding said vertical-axis center-pivot and said parallel electrical conductors, said drive-conduit being surrounded by the journal means, the confluential vessel, and the entire upright heighth of the outflow-elbow means and being sealably associated with said outflow-elbow means, the armature portion of the commutator means being attached to the the drive-conduit below said confluential vessel;
• (c) the upwardly rising extent of the medial-piping comprising at least two slanting-pipes converging into said confluential vessel, said medial piping further including horizontal portions extending from a lowermost end of the upwardly rising extent to the waterinflow pipe, said horizontal portions diverging from said waterinflow pipe and connected to said medial piping, and at least one medial piping further comprising at least one slanting pipe extending from said waterinflow pipe to said confluential vessel, all said slanting pipes and horizontal pipes providing waterflow communication between said waterinflow pipe and said confluential vessel and providing the support for the journal means thereabove, and all said slanting pipes being wholly laterally offset from said vertical-axis to provide space below the confluential vessel and the outflow-elbow means for the electrical commutation means;
• and
• (d) inter-conduits connection means to cause the drive-conduit and the attached armature to co-rotate with said water distributing conduit around said vertical-axis center-pivot.