Discharge apparatus having orbitally moving discharge ring

An apparatus for discharging material from a silo-like walled container having walls and an interior bottom member that defines an annular-opening between said interior bottom member and said walls, the apparatus comprising:

• first and second rotatable discharge rings, each having an outer periphery and being disposed above said interior bottom member within said walled container, the first rotatable discharge ring able to rotate about a first axis through its own discharge ring center and to simultaneously orbit about a second axis, and the second rotatable discharge ring able to rotate about a third axis through its own discharge ring center and to simultaneously orbit said second axis;
• a plurality of retaining members disposed within said walled container above said discharge rings and adjacent a radially outermost orbit of said discharge rings for contact with a said outer periphery of each of said discharge rings;
• said retaining members and said discharge rings cooperating such that rotation of each of said discharge rings about said second axis is promoted;
• wherein motion of said discharge rings urges said material within said walled container radially outward toward said annular opening for discharge therethrough.