Sand mulling machine plow

Claim 1

In a mulling plow for use in a sand mulling machine having a vertically axised mulling bowl with a bottom wall and a generally cylindrical shaped peripheral wall and a vertically axised, central, rotatable hub, with the plow being formed as a generally flat, elongated plate spaced away from, but secured to the hub for rotation therewith, with the plate located adjacent the peripheral wall and being sloped along its longer length dimension relative to the bottom wall, so that its leading length edge, i.e., its narrower edge which leads in the direction of rotation, is close to the bottom wall, and its opposite trailing, edge is spaced a distance above the bottom wall, wherein the plow rotates in a circular path adjacent the peripheral wall and lifts and directs the sand material being mulled upwardly from the bowl bottom wall, that is, from the leading edge, and in an upwardly sloped direction along the upper, elongated surface of the plate and across the trailing edge, the improvement comprising: the plow trailing edge portion being formed in the shape of a number of spaced apart, narrow, elongated, roughly parallel fingers extending from the trailing edge approximately one-third the length dimension of said plow plate towards the leading edge of the plate to form the rear portion of the plow in a comb-like configuration; said spaced apart fingers providing spaces between adjacent fingers such that the sand material is lifted upwardly along the sloped surface of said plow plate, the material in part passes between said fingers and in part over the fingers and said material is thereby subjected to a combing-like action as it passes along and leaves the trailing portion of the plate to blend and mix the sand material.