Abstract: A piston rod defining a surface and including a structure on the surface configured to be traced by a position sensor during a stroke of the piston rod. The surface, and consequently the structure, are covered by a coating by build-up welding. The structure is produced in the same operation during the build-up welding of the coating. The entire structure may be formed by the build-up welding, or a coded basic profile is incorporated before the build-up welding.

Abstract: A piston rod defining a surface and including a structure on the surface configured to be traced by a position sensor during a stroke of the piston rod. The surface, and consequently the structure, are covered by a coating by buildup welding. The structure is produced in the same operation during the buildup welding of the coating. The entire structure may be formed by the buildup welding, or a coded basic profile is incorporated before the buildup welding.

Abstract: A swivel caster comprising in general a wheel, a hemispherical die casting having a spindle mounting the wheel, the die casting having an edge closely adjacent to one side of the wheel, and notches formed at the edge of the hemispherical die casting, the edges forming the notches being in planes generally tangent to circles having axes coincident with the axis of the spindle.In addition a flat cover is provided to isolate rough spots due to die casting.