Patent ID: 7246590

Claim:
A valve train of an internal combustion engine comprising a tappet and a tappet pushrod that is actuated by said tappet, said tappet pushrod being at least partly hollow and comprising on one end, a first support for an at least indirectly contacting pressure piston of a hydraulic lash adjuster of said tappet that follows a periodic driving element, typically a cam, a second support for a follower member, typically a rocker arm, being arranged on a further end of the tappet pushrod, said first support comprising a passage for hydraulic medium that can be routed out of the pressure piston during operation of the internal combustion engine into an interior of the tappet pushrod, wherein a one-way valve means is installed in the tappet pushrod for retaining, during a standstill of the internal combustion engine, a hydraulic medium column which, as viewed in gravity direction, is situated above the one-way valve means, the second support comprises a passage for the hydraulic medium to the follower member, and the one-way valve means is configured to form together with an inner wall of the tappet pushrod, a choke for limiting a flow of hydraulic medium to the passage in the second support and a floating body is installed in the interior of the tappet pushrod, said floating body has a geometry of one of a ball, a cylinder tapered toward the first support or a plate and forms a part of the one-way valve means, a valve seat for said floating body extends in a region of the first support and communicates with the passage of the first support.