Patent ID: 7261259

Claim:
An improved rail way frog, the improvement comprising opposite side flangeways with a predetermined length and a predetermined width, each flangeway comprising a channel and an upper surface for supporting a rail car wheel, said channel comprising a first segment and a second segment and an inner wall and an outer wall; said first segment having a first segment channel width equaling approximately a distance from the inner wall to the outer wall measured at least one point along the first segment, said second segment extending from an end of the first segment, said end positioned at a point approximately midway to a point section, said second segment having a plurality of second segment channel widths that increase in distance sequentially from a point proximate to the end of the first segment to an ending of the second segment such that the outer wall of the second segment forms a generally straight line, said second segment channel having a depth that increases from the end of the first segment to the ending of the second segment, said second segment channel width at the end of the first segment approximately equal to the first segment channel width, said ending being opposite the end of the first segment and wherein the outer wall of the second segment forms a 25 degree to a 30 degree angle with the inner wall.