Abstract: A portable multi-purpose rail grinding machine for grinding field welds, switch points and frogs, including a hydraulically driven grinder with a disk-shaped stone adjustably mounted on a frame for setting the grinding stone between horizontal and vertical positions, an adjustable rail assembly including a hook-shaped guide member and a flanged wheel guide member, one of which may be selectively chosen to guide movement along a rail, and adjustably positionable handlebars for allowing the operator to control and manipulate the grinder from an ergonomic upright position.

Abstract: A hydraulically powered rail pre-heater for heating rail ends before they are welded together, which includes a blower driven by a hydraulic motor for producing a substantially constant flow of air, a source for propane gas or other combustible media to be regulated and mixed and then delivered to a torch for the application of a flame to the rail ends.

Abstract: A hydraulically powered rail pre-heater for heating rail ends before they are welded together, which includes a blower driven by a hydraulic motor for producing a substantially constant flow of air, a source for propane gas or other combustible media to be regulated and mixed and then delivered to a torch for the application of a flame to the rail ends.

Abstract: A flange or mounting assembly for mounting a cutting tool on a drive shaft of a motor, which includes an inner flange having a spindle, an outer flange and fastening means for retaining the outer flange on the spindle of the inner flange and for maintaining the cutting tool in frictional engagement with the flanges, wherein the flanges include means for preventing relative rotation therebetween so that the flange assembly is particularly adaptable for use on bi-rotational power equipment.