US Patent 7571903 Mobile hopper system

A hopper assembly is provided including a hopper, a hopper base, the hopper being detachable from the hopper base, and a hopper shoe, the hopper shoe being fixable to the hopper and securable to the hopper base. A hopper assembly also is provided including a hopper, a first hopper base, and a second hopper base. The hopper is detachable from the first hopper base and movable to the second hopper base. A gathering device is also provided. A method is also provided.