Patent ID: 8256394

Claim:
A switchable bucket tappet for a valve drive of an internal combustion engine, comprising: a bucket basic body having a ring-like base and being guided by means of a skirt, which projects from an outer edge of the ring-like base, in a bore of the internal combustion engine, the ring-like base being acted on by at least one high-lift cam, a hollow cylindrical extension projecting from an inner edge of the ring-like base, in the bore of the hollow cylindrical extension runs an inner body which is axially movable relative to the bucket basic body and whose disk-like base comes into contact with a low-lift or zero-lift cam and whose underside has formed in it an abutment for at least indirect contact with a gas exchange valve, with at least one coupling piston running in a bore of the inner body, the at least one coupling piston, in order to obtain a high valve lift, is placed in engagement in sections with a driver surface of the bucket basic body, with a low valve lift or zero valve lift being obtained when the at least one coupling piston is fully retracted into the bore of the at least one coupling piston, and with a lost motion spring acting between the bucket basic body and the inner body, wherein the inner body, at least proceeding from one end surface, is of substantially thin-walled, tubular design having upper and lower hollow cylindrical sections separated from one another by a solid, one-piece section, with said solid section being integrally connected to said upper and lower hollow cylindrical sections at a distance from the end surface at both ends of the inner body, in which the solid section runs the bore of the at least one coupling piston, with the at least one coupling piston, with the driver surface for the at least one coupling piston being formed by a lower edge, which is spaced apart from the ring-like base and the disk-like base of the hollow cylindrical extension, and with a region of the ring-like base of the bucket basic body being of virtually symmetrical and continuously thin-walled design.