Patent ID: 6994299

Claim:
A railroad frog apparatus for connecting intersecting rail lines comprising: a body having flangeways that intersect; at least one connection plug extending from the body for connecting to a running rail; the at least one connection plug having a cross-sectional profile that is substantially identical to a cross-sectional profile of the running rail; and wherein at least one of the flangeways has a floor surface having a convex cross-section defined by a first arc, a second arc and a third arc; the first arc extending from a first point to a second point; the second arc extending from the second point to a third point; the third arc extending from the third point to a fourth point; the first and fourth points being at flangeway depths so as to avoid contact with a flange of a train wheel passing through the flangeway; wherein upon the train wheel entering the flangeway, the flange of the train wheel initially contacts the floor at the first arc; and wherein upon the train wheel exiting the flangeway, the flange of the train wheel disengages the floor at the third arc.