Abstract: A self-adjusting hydraulic valve tappet arranged in a bore of a cylindrical guide bore of a cylinder head of an internal combustion engine and being contacted at one end face by a cam of a shaft and bearing with a second end face against a valve stem, the tappet comprising a cup shaped housing comprised of a hollow cylindrical wall (2) closed at one end by an end member (3) against the outside of which the cam abuts and a cylindrical guide sleeve (6,30,32) concentric with the cylindrical wall (2) and arranged in the center of an annular flange element (5) which at its outer circumference merges into the cylindrical wall (2) of the housing and defines an annular oil reservoir (14) between the cylindrical wall (2) and the cylindrical guide sleeve (6,30,32), the oil reservoir (14) being supplied with oil through a bore (15) leading to the outside of the housing, a self-adjusting hydraulic play compensation element (13) being guided for longitudinal movement in the guide sleeve (6,30,32) and bearing with an end f

Abstract: A hydraulic valve clearance compensation element comprising a hydraulic censation element (2) in a bore of a rocker arm (1) or similar actuating mechanism extending coaxially from a stem (4) of an engine valve, a longitudinally moveable, adjusting piston (3) ending towards the valve stem (4) in a spherical projection (5) and between said projection and the end face (6) of the valve stem (4) a guide shoe (7,14) is arranged, comprising, on the one hand, a spherical cavity (8) which engages the spherical projection (5) of the adjusting piston (3) and, on the other hand, being supported with a plane surface (9) on the end face (6) of the valve stem (4), characterized in that, on the adjusting piston (3), a cage portion (11) emanates from a location situated behind the spherical projection (5), and extends in the direction of the valve stem (4) and ends there in radially inwardly directed locating zones (13), which engage behind an outer surface (15) of the guide shoe (7,14) and projections (10), respectively, of

Abstract: An hydraulic cup-shaped valve tappet for internal combustion engines with overhead camshaft comprising an outer hollow cylindrical housing (7) closed at one end by a bottom (3) in which is provided, concentrically radially spaced, a guide tube starting from the bottom, and in which is supported a longitudinally moveble plunger (5) of an hydraulic clearance compensation element, against the face thereof the end of a valve stem is abutting, a control cam (4) abutting against the bottom of the housing, characterized in that in the circular space between the cylindrical internal surface of the housing (7) and the external surface of the guide tube (8) a bellow element (16,21,25,31) is provided, said element being tightly connected, on the one hand, with the internal surface of the housing (7) and, on the other hand, with an end of the plunger (5) projecting from the guide tube which is capable to simultaneously take up variations in length and in volume and which together with the remaining tappet components defi

Abstract: A cup-shaped casing of a self-adjusting hydraulic tappet for overhead camft internal combustion engines, the casing comprising a hollow cylindrical outer part (1) closed at one end by an end member (3) and disposed concentrically therein a hollow cylindrical inner element (4) sealingly connected at its end distal from end member (3) to the bore of the outer part (1) by an annular flange (5), the actual clearance-compensating element (9) being guided in inner element (4) and having around it an annular oil reservoir (10) bounded radially by cylinder wall (2) of outer part (1) and bounded axially by end member (3) of outer part (1) and by flange (5), the outer generated surface of outer part (1) being provided with a peripheral groove (7), characterized in that peripheral groove (7) is axially at least as far from end member (3) as the transition between flange (5) and cylinder wall (2) of outer part (1) and an axial groove (11) starts from peripheral groove (7) at at least one place on the periphery and extend

Abstract: A novel inner element for a hydraulic valve play compensation element for ternal combustion engines is comprised of a cylindrical element (3) closed at one end and having a reduced outer diameter (7) and a peripheral groove (8) therein at the other open end and a piston element (5) guided therein for longitudinal displacement and projecting from the open end of cylindrical element (3) beyond the latter with a reduced outer diameter (6) in this region, a sheet metal cap (9) with a radial flange (10) engaging the reduced diameter (6) region of piston element (5) and with a cylindrical collar (13) on the open end of cylindrical element (3) engaging on at least some points of its circumference with groove (8), characterized in that sheet metal cap (9) has at least one projection (11,14,15) radially projecting at at least one point about its circumference beyond the outer diameter of cylindrical element (3).

Abstract: A valve tappet for internal combustion engines with an overhead cam shaft veably mounted in the sliding guide directly between the cam and valve stem and which is designed as an automatic play compensating element comprising an outer part and an inner part guided in one another for longitudinal displacement and enclosing between them a pressure chamber connected by a non-return valve to an oil storage chamber charged with oil from the lubricating system of the engine, the outer part cooperates with the sliding guide and the cam and the inner part cooperates with the valve stem, the oil storage chamber being arranged inside the outer part so that it extends exclusively in the radial direction around the inner part and having in its lower portion an oil feed bore and at least one oil transfer bore to the pressure chamber, an oil carrying passage adjoining the oil feed bore inside the oil storage chamber opening freely into the oil storage chamber in the upper portion thereof, the oil carrying passage being form

Abstract: A valve tappet for internal combustion engines with an overhead cam shaft moveably mounted in the sliding guide directly between the cam and valve stem and which is desinged as an automatic play compensating element comprising an outer part and an inner part guided in one another for longitudinal displacement and enclosing between them a pressure chamber connected by a non-return valve to an oil storage chamber charged with oil from the lubricating system of the engine, the outer part cooperates with the sliding guide and the cam and the inner part cooperates with the valve stem, the oil storage chamber being arranged inside the outer part so that it extends exclusively in the radial direction around the inner part and having in its lower portion an oil feed bore and at least one oil transfer bore to the pressure chamber, an oil carrying passage adjoining the oil feed bore inside the oil storage chamber opening freely into the oil storage chamber in the upper portion thereof, the oil carrying passage being fo