Patent ID: 7717063

Claim:
A spreading device for feedstuff comprising: a tank having a bottom board and a plurality of vertical side boards along a circumference of a top surface of said bottom board thereby forming a storage space for feedstuff, each of said vertical side boards comprising a vertical static plate and a vertical door plate having a vertical side connected to a vertical side of said vertical static plate by a hinge thereby enabling said vertical door plate to rotate with respect to said vertical static plate, said hinge having an elastic element for preventing said vertical door plate from being opened outward, said vertical door plate having a bottom edge which is bent towards said bottom board to form a first guard plate, said door plate having an edge which is opposite to said hinge and is bent towards an adjacent static plate to form a second guard plate; and a tubular joining member mounted inside said storage space at a central spot of said bottom board for attaching to a rotational driving device through said bottom board; wherein when said joining member and said tank are rotated by said driving device, a centrifugal force on said feedstuff pushes said door plate open and said feedstuff is thereby cast out automatically.