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| Number | Title | Issue Date |
| 7380531 | Variable valve drive for changing the control timing of cam-actuated gas-exchange valves A variable valve drive for changing control timing of cam-actuated gas-exchange valves of an internal combustion engine is provided, with a tappet (6a, 6b, 6c), which, with convex cam engaging contour (5), engages a c... | 06/03/2008 |
| 7308760 | Method of making a valve lifter A valve lifter and a method of manufacture thereof is provided in which sliding properties of a cam on a cam-contacting sliding surface in an upper surface of a valve lifter are improved by forming the cam-contacting sliding surface as a concave surface to permit re... | 12/18/2007 |
| 7273026 | Roller follower body The present invention relates to a roller follower, comprising an outer surface, enclosing a first cavity, a second cavity, and a transition opening, wherein the first cavity includes a first inner surface configured to house a cylindrical insert the second cavity i... | 09/25/2007 |
| 7246586 | Wear-resistant coating and process for producing it The present invention relates to a process for producing a wear-resistant coating and to a wear-resistant coating on predetermined surfaces of machine or engine parts, in particular for internal combustion engines, which are exposed to frictional wear, comprising at... | 07/24/2007 |
| 7165310 | Method for connecting two members A connecting structure includes a first member including a hole which has a narrower width at an opening portion than a width at a bottom portion and a projecting portion projected toward the opening portion at the bottom portion of the hole, and a second member wit... | 01/23/2007 |
| 7152708 | Propshaft with improved crash-worthiness A frangible telescopic propeller shaft includes an elongated hollow cylindrical body, a reduced diameter intermediate portion along a length of the body, and at least one spin-formed transition area between the intermediate portion and the body. The transition area ... | 12/26/2006 |
| 7077337 | High pressure fuel supply apparatus A high pressure fuel supply apparatus 6 having: a plunger 161 reciprocating and sliding in a sleeve 160 of a high pressure fuel pump 16 so as to form a fuel pressurizing chamber 163 between the plunger 161 and the sleeve ... | 07/18/2006 |
| 6385847 | Seat faced engine valves and method of making seat faced engine valves An improved process 30 for making an engine poppet valve 10 provides an unfinished poppet valve 10 with an initial diameter (d1) of a valve head 22 and an initial thickness (t1) of an interface 56 between a seat facing groove 54 and ... | 05/14/2002 |
| 6209197 | Method of manufacturing tappet in an internal combustion engine A method of manufacturing and Al alloy tappet, used in an internal combustion engine, includes supplying wear resistant particles on a surface of a light metal tappet body, the surface slideably contacting a cam, kneading said particles with a surface lay... | 04/03/2001 |
| 6089200 | Valve tappet actuated by a CAM of an internal combustion engine A valve tappet actuated by a cam of an internal combustion engine comprises a cup (1) having a hollow cylindrical skirt (2) and a cup bottom (3) which closes the skirt (2) at one end. On an outer surface, the skirt (2) comprises a peripheral groove (4), a... | 07/18/2000 |
| 6073345 | Method of manufacturing a tappet A tappet is used in an internal combustion engine. A cam-slidably-contacting member is placed on a top wall of a tappet body via diffusing material that includes a mixture of one or more elements of Zn, Mg, Sn, Cu and Pb. The cam-slidably-contacting membe... | 06/13/2000 |
| 6044552 | Tappet made of light metal and a method of manufacturing the same A tappet made of light metal comprises a ceiled cylindrical tappet body made of light metal, and a cam receiving plate made of hard metal which has the same outer diameter as that of the tappet body, and which is provided at its outer peripheral edge with... | 04/04/2000 |
| 6044813 | Electromagnetic actuator with detached lower collar to align with cylinder head bore An electromagnetic actuator is provided for mounting to a cylinder head of an engine. The actuator includes an actuator assembly including housing structure and an armature. A pair of electromagnets are disposed in the housing structure. An alignment coll... | 04/04/2000 |
| 5970613 | Method of manufacturing a wear resistant cylinder A tappet made of Al alloy is used in a valve operating mechanism of an internal combustion engine of a vehicle. On the whole outer circumferential surface of the tappet, a helical projection and a helical groove are formed alternately to form an uneven su... | 10/26/1999 |
| 5947069 | Roller type mechanical tappet A tappet comprises a foot having a convex cam contact surface and an axially extending hub, a tappet body having a lower body portion with a lower axial bore formed therein to receive the axially extended hub of the foot, and a bearing assembly positioned... | 09/07/1999 |
| 5943990 | Tappet in an internal combustion engine and a method of manufacturing the same A tappet is used in an internal combustion engine. A cam-slidably-contacting member is placed on a top wall of a tappet body via diffusing material which comprises mixture of one or more elements of Zn, Mg, Sn, Cu and Pb. The cam-slidably-contacting membe... | 08/31/1999 |
| 5934238 | Engine valve assembly A valve assembly 10 for use in an engine. The assembly 10 includes a valve 12 including a valve seat face 16. An insert 18 is mounted within the engine for cooperating in sealing engagement with the valve seat face 16. The insert 18 and the valve seat fac... | 08/10/1999 |
| 5918366 | Method of forming a tappet in an internal combustion engine An Al alloy tappet used in an internal combustion engine has a spiral groove on the outer circumferential surface of a tappet body. The spiral groove is formed by pushing a cutting tool against the outer circumferential surface and feeding it in an axial ... | 07/06/1999 |
| 5918367 | Method of producing valve lifter A method of producing a valve lifter to be used in a valve operating mechanism of an automotive vehicle. The valve lifter includes a skirt section, a crown section formed one end of the skirt section so that a cam of a camshaft is slidably contactable wit... | 07/06/1999 |
| 5904123 | Mechanical valve tappet A mechanical valve tappet for timing the valves of an internal combustion engine comprising a cup-shaped housing (1), consisting of a hollow cylindrical wall (2) closed at one end by a bottom (3) which is exteriorly contacted by a control cam (6), while o... | 05/18/1999 |
| 5809644 | Valve lifter An improved, light weight tappet and method of manufacturing such a tappet. The tappet is comprised of a light weight sleeve to which a hardened disk is metallurgically bonded.... | 09/22/1998 |
| 5758415 | Method of manufacturing a tappet in an internal combustion engine A tappet in an internal combustion engine comprises a cylindrical body and a cam receiving plate on the top wall of the cylindrical body. To manufacture the tappet by forging, light metal material is provided on the surface which has a groove of the cam r... | 06/02/1998 |
| 5743224 | Valve lifter surface and processing method thereof A valve lifter and processing method therefor include a valve lifter surface to be installed in a recess of a cylinder head of an internal combustion engine. The method includes a grinding step for beveling, or tapering, the circumferential end of a cylin... | 04/28/1998 |
| 5740769 | Method of adjusting a valve clearance Between the end of a valve and a valve-operating cam in an internal combustion engine, a valve lifter is inserted. A filler enclosing portion is formed between a shim and the body of the valve lifter. Through an opening from an injector, a filler is intro... | 04/21/1998 |
| 5729900 | Method of manufacturing a tappet in an internal combustion engine A method of manufacturing a tappet which is used in an internal combustion engine of vehicles is provided. A core material of the tappet has a helical groove on the outer circumferential surface, and a wear resistant coating layer, the ends of which are c... | 03/24/1998 |
| 5724734 | Method of forming a tappet in an internal combustion engine To manufacture a tappet in an internal combustion engine, a tappet rough body which comprises a cylindrical portion with an upper wall and an annular side wall is moulded by press processing of metal powder, such that the upper wall, the cylindrical porti... | 03/10/1998 |
| 5706773 | Integral formed oil column extender for hydraulic lash adjuster A hydraulic lash adjuster for an internal combustion engine, and a method of its construction is disclosed. The lash adjuster has a cylindrical follower body in which a tubular plunger is slidingly disposed. The plunger cooperates with the follower body t... | 01/13/1998 |
| 5605122 | Tappet in an internal combustion engine and a method of manufacturing it A tappet is used in an internal combustion engine of vehicles. A core material of the tappet has a helical groove on the outer circumferential surface, and a wear resistant coating layer the ends of which are chamfered. In the vicinity of the end of the c... | 02/25/1997 |
| 5537744 | Tappet for an IC engine A tappet in a direct acting type valve operating mechanism of an internal combustion engine comprises a top wall and a cylindrical portion. The upper and lower surfaces of the top wall contacts a rotary cam and the end of a stem of an engine valve respect... | 07/23/1996 |
| 5438754 | Method of making a valve lifter for engine Tappet assemblies of a main body element are formed from a lightweight material and an engaging element adapted to engage the valve stem and formed from a harder, more wear resistant element. The engaging element and the main body element have cooperating... | 08/08/1995 |
| 5430934 | Method for manufacturing a direct acting hydraulic tappet A method for making a direct acting tappet in which an oil groove and interior structure defining a weld interface are formed in a cupshaped body by a rolling process, the body is heat treated, a web and hub structure is positioned against the weld interf... | 07/11/1995 |
| 5379626 | Method of forming a tappet body in an internal combustion engine To manufacture an Al alloy tappet in an internal combustion engine, an intermediate which has a circular upper wall and a cylindrical skirt is formed in the first forging step. In the second forging step, a recess is formed on the lower surface of the upp... | 01/10/1995 |
| 5349748 | Method of manufacturing a tappet for an internal combustion engine A method of manufacturing a tappet used in a valve operating mechanism of a direct acting type in an internal combustion engine. A tip engaged with a center bore of an inner upper surface of a tappet body includes upper and lower convex surfaces and a rou... | 09/27/1994 |
| 5320074 | Direct acting hydraulic tappet A direct acting hydraulic tappet including a one piece body shell having an outer cylinder, an inner cylinder and a plurality of integral axially extending webs that connect the outer cylinder and the inner cylinder. A cam face member is attached to one e... | 06/14/1994 |
| 5267538 | Mechanical valve tappet for an internal combustion engine A mechanical valve tappet arranged in a guide bore of a cylinder head of an internal combustion engine, which valve tappet comprises a cup-shaped housing with a hollow cylindrical wall (1) closed at one end by a bottom (2) against which a control cam runs... | 12/07/1993 |
| 5253418 | Method of forming tappet of the kind having ceramic seat plate A tappet for an internal combustion engine consists of a tappet main body and a ceramic seat plate brazed to the tappet main body. The tappet main body is made up of a first part made of low carbon steel and a second part made of metal. In manufacture, th... | 10/19/1993 |
| 5185923 | Method of making a frictionally sliding component In a frictionally sliding structure, a metallic intermediate member is provided, which has a head and a stud. The stud is interfit into a recess provided with a tappet, while the head has a ceramic chip on which a cam is adapted to frictionally slide.... | 02/16/1993 |
| 5184583 | Light metal tappet with wear-resistant armouring made of a steel with an austenitic matrix A light metal tappet particularly for the timing gear of an internal combustion engine comprising a tappet base body and a steel plate anchored at the contact face for the control cams of the timing gear and having a hardened surface, characterized in tha... | 02/09/1993 |
| 5168841 | Tappet with ceramic seat plate A tappet for an internal combustion engine comprises a tappet main body and a ceramic seat plate. The tappet main body is constituted by axially separated first and second parts which are made of different metallic materials. The first part is for install... | 12/08/1992 |
| 5099807 | Preloaded axle stake for roller follower A method for fixing an axle within a roller tappet in which a preload is applied to the axle in a direction perpendicular to its longitudinal axis while the ends of the axle are deformed into chambers formed in the ends of the axle-receiving aperture in t... | 03/31/1992 |
