Patent ID: 6139410
Filing Date: 2000-10-31
Classification: E01B

Abstract:
A grinding apparatus for grinding railhead of track rail wherein the raihead when viewed in elevation has a cross sectional profile with a pair of opposite sides and a top portion, said apparatus comprising a pair of grinding assemblies, each said grinding assembly being rotatable about a respective rotational axis and said grinding assemblies being arranged side by side such that said respective rotational axes are parallel, each of said grinding assemblies including a main body for grinding a respective half portion of the railhead wherein each of the half portions of the railhead include one of said opposite sides of said railhead and approximately half of the top portion of the railhead, each said main body including at least three grinding blade support portions radially spaced apart an equivalent amount about said respective rotational axes, each said grinding blade support portion, when viewed in elevation, having a profile that is complementary to a corresponding said half portion of the railhead, each said grinding blade support portion having two radially spaced surfaces wherein one of said two radially spaced surfaces is a leading surface and the other of said two radially spaced surfaces is a trailing surface depending on the direction of rotation of the corresponding grinding assembly, each of said leading and trailing surfaces having a profile in elevation that is complementary to a corresponding said half portion of the railhead, a plurality of grinding blades being held on each of said leading and trailing surfaces such that said plurality of grinding blades on each of said leading and trailing surfaces are selectively positioned such that grinding of said railhead is accomplished by the grinding blades on each of the leading and trailing surfaces corresponding to each of the grinding blade support portions on each of the main bodies of the respective said grinding assemblies.