Patent ID: 8191459

Claim:
A high-pressure pump, in particular for a fuel injection system of an internal combustion engine, comprising: a drive shaft; at least one cam or eccentric element being driven by the drive shaft, at least one pump element having a pump piston which is driven in a reciprocating motion by the cam or eccentric element; a support element disposed between the pump piston and the cam or eccentric element; a tappet disposed between said support element and said pump piston; said support element disposed within said tappet; a roller rotatably supported in the support element and rolling on the cam or eccentric element; a bracing means for the roller disposed within said support element in a direction of a rotational axis of the roller and adjacent to the roller, the roller and/or the bracing means, at least in a contact region between the roller and the bracing means, has a surface with high wear resistance, the roller, on its side face facing toward the bracing means, is embodied with a convex curvature, wherein the convex curvature of the side face of the roller is at least spherically shaped, the bracing means is embodied with a concave curvature, and that a radius (R) of curvature of the side face of the roller is approximately 70 to 100% of a radius (R 1 ) of curvature of the bracing means.