Patent ID: 7210437

Claim:
A periodically actuable tappet for a valve train or a pump drive, said tappet comprising a hollow cylindrical skirt that can be arranged through an outer peripheral surface in a guide bore of a surrounding structure, said skirt comprising a window-type aperture in which a separate anti-rotation device is arranged through a radially inner portion, a radially outer portion of the anti-rotation device extending beyond the skirt for guidance in a longitudinal groove that intersects the guide bore, wherein the anti-rotation device, as viewed in cross-section, is substantially mushroom-shaped, the inner portion has a rectangular cross-section corresponding to a geometry of the aperture of the skirt, into which cross-section, the outer portion merges in the manner of a roof through a fractional cylindrical outer peripheral surface, inner legs of the outer portion extend beyond the aperture in peripheral direction, are arched and bear downward against the outer peripheral surface of the skirt.