Spreader for particulate material

A disposable spreader for distributing particulate material comprising a dispenser, said dispenser being in the form of an elongated body adapted for rotation about its axis and having inner and outer concentric chambers in fixed relationship to each other, said chambers in turn being defined by spaced inner and outer concentric walls, each wall having a series of openings therein spaced both circumferentially around and axially across said walls, each opening in said outer wall being in substantial registry with an opening in the inner wall, the inner chamber adapted to act as a reservoir for particulate material, the outer chamber adapted to provide a circumferential passageway for particulate material entering therein from the inner chamber through the spaced opening in the inner wall and exiting therefrom through the spaced openings in the outer wall, said circumferential passageway extending axially completely across said elongated body, one-way flow-restriction means within said passageway and in association with the openings in said inner and outer walls adapted to restrict the flow of particulate material from said dispenser to the exterior upon rotation of the dispenser in a first direction, said flow-restriction means adapted to permit flow of particulate material through said passageway to the exterior upon rotation of the dispenser in the opposite direction, a pair of wheels mounted at opposite axial ends of the dispenser and means for advancing the spreader along a given direction as the dispenser rotates.