Patent ID: 6065435
Filing Date: 2000-05-23
Classification: F01L,Y10T

Abstract:
A valve tappet actuated by a cam of an internal combustion engine comprising a cup (1) made of a ferrous material and having a hollow cylindrical skirt (2) and a cup bottom (3) which closes the skirt (2) at one end, said skirt (2) comprising a peripheral groove (4) on an outer surface and two beads (5, 21) on an inner surface, there being arranged concentrically within the cup (1), a metal inner element (6) comprising a casing (9) which bears against at least one of the two beads (5, 21) while a hydraulic valve clearance compensation element (10) is guided for axial displacement in the inner element (6), the cup (1) is hardened in a heat treatment process, and the inner element (6) is unhardened wherein the first bead (5) is arranged on the side of the skirt (2) opposite to the peripheral groove (4) and the second bead (21) is arranged on the end of the skirt (2) adjacent the cup bottom (3).