Patent ID: 6659052
Filing Date: 2003-12-09
Classification: F01L

Abstract:
Engageable cam follower for acting on a pushrod in or being directly activable to act on the valve train of an internal combustion engine or engageable lifter element for a rocker-arm type of cam follower in the valve train of an internal combustion engine, comprising a thin-walled hollow cylindrical housing having a borehole, an internal element axially movable with respect to the housing positioned in the borehole, the housing and the internal element each including a radial borehole aligned in a relative position to each other, and at least one piston located in the radial borehole of the internal element that is movable into the radial borehole of the housing for coupling the internal element with the housing in the relative position, the piston having an end facing the radial borehole of the housing that is curved in two dimensions to be cylindrical in form and being aligned with and having a radius equal to the borehole of the housing, the piston being guided for non-rotatable movement in the radial borehole of the internal element.