| 摘要 |
A mobile frame is provided including a frusto-conical ground wheel journaled for rotation about a generally horizontal but inclined transverse axis with the lowermost slant height of the wheel disposed for surface-to-surface contact with the ground over which the frame is advanced. The wheel includes a central body occupying the central portion of the interior thereof thereby limiting the useful volume of the interior of the wheel to an outer circumferential area thereof and stone deflecting structure is provided for deflecting stones lying on the ground into the lower periphery of the outer circumferential interior area of the wheel through the open side thereof. The body includes a plurality of radially outwardly facing relatively angulated sides spaced about the axis of rotation of the wheel and convergent toward the open end thereof. An inclined chute is supported in generally horizontal registry with the upper periphery of the body at the minor dimension end thereof adjacent the open side of the wheel and a driven fluted kicker roll is journaled outwardly of and extends along the outer end of the chute remote from the open end of the wheel for engaging stones passing from the interior of the wheel and being discharged downwardly therefrom along the chute. The engaged stones are then laterally discharged from the fluted roll into an upwardly opening receptacle disposed on the side of the roll remote from the chute.
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