Patent ID: 6953016

Claim:
A tappet in a valve train of an internal combustion engine having a bottom camshaft for acting on a tappet push rod said tappet being arranged with a housing for axial displacement, but secured against rotation, in a guide bore of the internal combustion engine, said housing comprising on one front end, two cheek-like extensions that are situated diametrically opposite each other and are connected by an axle on which a rotary roller extends for making direct contact with a cam, said front end comprising a transverse region that connects the extensions axially inside and has a cylindrical shape in a length direction of the roller, an inner element being arranged in the housing for axial displacement relative to the housing, a head of the inner element forming a support for the tappet push rod in a region of a further front end of the housing, and said guide bore being intersected by one passage or by two passages for routing hydraulic medium to the tappet, wherein a radius center point of the transverse region of the one front end is situated with a lateral offset to a longitudinal axis of the tappet, one side of a periphery of the housing between the extensions is distinctly longer than an opposite side, and the one passage, or both passages is/are led to the housing at least approximately on the longer one side of the periphery wherein the tappet comprises at least one of a hydraulic lash adjuster and a coupling means for optionally uncoupling the inner element from the housing, only one passage being provided for a supply of hydraulic medium to said hydraulic lash adjuster and said coupling means.