Ice removing machine

Claim 1

A machine for removing ice from a surface comprising, in combination, a body maneuverable over a said surface; means for supporting the body above said surface; a plurality of cutting heads depending from the body into proximity to the surface, the cutting heads being mounted on the body for rotation about substantially vertical laterally spaced axes; power means on the body; and power transmission means coupling the power means to the several cutting heads for concurrent rotation thereof; each said cutting head comprising a disc and a plurality of chippers fixed to and depending from the disc, each chipper comprising: a prism of high hardness material with a front, a back and a bottom; said front being a portion of said prism facing the direction of travel of the chipper; said back being a portion of said prism facing opposite said front; said bottom being a portion of said prism furthest from said body and closest to said surface, said bottom comprising a land portion adjacent to the front with a facet substantially parallel to said surface and a relief portion with a facet at an angle from said surface and receding from said surface as it approaches the back of the prism; each chipper having a beveled radially outer surface providing cutting clearance at the outer edge of the chipper;