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| Number | Title | Issue Date |
| 7617804 | Axial flow cooling for air-cooled engines A head for an air-cooled engine having at least two cylinders, each cylinder having a longitudinal axis, the head having a rocker arm mounted to rotate about a rocker arm axis in the head, the head further including an intake port and an exhaust port, and the head m... | 11/17/2009 |
| 7367293 | Four-stroke engine A four-stroke engine includes a cylinder block, a cylinder head mounted on the cylinder block, multiple cooling fins formed on the cylinder block and the cylinder head, a combustion chamber and an intake port and exhaust port formed in the cylinder head and in commu... | 05/06/2008 |
| 7363886 | Power unit To achieve improved cooling in a power unit, a first fan is coupled with an end of a crankshaft of an internal combustion engine to cool at least a cylinder of the internal combustion engine, and a second fan is coupled with another end of the crankshaft to cool at ... | 04/29/2008 |
| 7341027 | Portable 4-cycle engine and portable machine equipped with the 4-cycle engine A portable 4-cycle engine with a configuration which allows cooling air to flow in the direction of the crankshaft relative to a cylinder head on a cylinder, and a portable machine equipped with this engine, are provided, respectively. In such an engine, the cylinde... | 03/11/2008 |
| 7225767 | Conversion of an air-cooled engine to liquid cooling In some aspects of the invention the invention will relate to conversion of an existing VW air cooled engine to liquid cooling, and in still further aspects it will relate to the design of a water jacket to maximize heat rejection of a combustion chamber and piston ... | 06/05/2007 |
| 7165516 | Cooling unit for air-cooled internal combustion engine An inventive cooling unit for an internal combustion engine comprises a plurality of cooling fins provided on outer surfaces of a cylinder block and a cylinder head, and vibration control rubbers interposed between cooling fins that face each other so as form a cool... | 01/23/2007 |
| 6959780 | Vibration damping system for an engine mounted on a vehicle A vibration damping system for an engine mounted on a vehicle has mounting elements attached to frames of the vehicle, through which elements the engine is mounted on the frames, a damping weight provided outwardly of the engine, and a weight support unit fixed at o... | 11/01/2005 |
| 6957639 | Inclined engine In an inclined engine where a cylinder (2) projects from a crank case (1) obliquely and upwardly, when seen in a direction parallel to a center axis (3) of a crank shaft (10), under a specific observation condition in which the cylinder p... | 10/25/2005 |
| 6925970 | Air-cooled four-stroke internal combustion engine The present invention provides an air-cooled four-stroke internal combustion engine capable of achieving a high degree of cooling. The present invention is directed to an air-cooled four-stroke internal combustion engine including a crankshaft and a fan rotor rotata... | 08/09/2005 |
| 6877315 | Heat transfer head for a Stirling engine A heat transfer head (10) for a stirling engine is disclosed. The heat transfer head (10) comprises a plurality of external circumferential fins (30) projecting out from the heat transfer head (10). At least two of the adjacent fins (3... | 04/12/2005 |
| 6626134 | Engine cooling system and method for making same Engine cooling system and method for making same wherein an engine, engine casing, or component thereof or a component related thereto has at least one cooling fin (18) having at least a portion of an edge surface (32) including an engraved, or intagliate... | 09/30/2003 |
| 6530348 | Internal combustion engine An internal combustion engine includes a cylinder block with cooling fins cast integral therewith, and a cylinder head bolted on top of the cylinder block, first coolant passages being provided in the area of at least one cylinder contained in the cylinde... | 03/11/2003 |
| 6526923 | Internal combustion engine An internal combustion engine includes an engine block with at least one cylinder, a cylinder head which is fastened to the cylinder, the outside of the cylinder and the cylinder head including cooling ribs in order to discharge the heat produced during o... | 03/04/2003 |
| 5755194 | Overhead cam engine with dry sump lubrication system A single cylinder, internal combustion engine with a dry sump lubrication system. The engine includes an engine housing in which the overhead camshaft and crankshaft are rotatably supported, and the housing includes an integrally formed cylinder and head.... | 05/26/1998 |
| 5657729 | Fiber reinforced ceramic matrix composite cylinder head and cylinder head liner for an internal combustion engine A ceramic cylinder head or cylinder head liner for an internal combustion engine. The cylinder head is made of a fiber reinforced ceramic matrix composite material and includes a heat sink on the top surface to keep touch temperatures at a reasonable leve... | 08/19/1997 |
| 5421292 | Cylinder head assembly A small four cycle internal combustion engine is disclosed having a cylinder head assembly which comprises a cylinder head cooperating with a cylinder block of the engine, and a rocker box connected to the cylinder head so as to define an air passage ther... | 06/06/1995 |
| 5421297 | Four-cycle engine There is disclosed a four-cycle engine in which a crankshaft and a cam shaft are disposed generally parallel to each other, and an intake port and an exhaust port are formed in a cylinder head. The intake port and the exhaust port are arranged in such a m... | 06/06/1995 |
| 5072697 | Sealing apparatus for an internal combustion engine A cylinder block of an internal combustion engine, and in particular of a Harley-Davidson motorcycle engine, including improved sealing between the block and a secured cylinder head, and which is interchangeable with an original-equipment block. A nipple ... | 12/17/1991 |
| 4977863 | Air-cooled internal combustion engine having canted combustion chamber and integral crossover intake manifold An air-cooled internal combustion engine, a crankshaft and a camshaft rotatably journalled in the crankcase parallel to one another, and a cast intake valve chamber and cast exhaust valve chamber each cast integrally with the cylinder and communicating wi... | 12/18/1990 |
| 4964378 | Engine cooling system A cooling device is provided for an engine having a cylinder head, a crankcase and a crankcase cover. The device includes a jacket formed in the crankcase for retaining therein a liquid cooling medium, and a plurality of fins is provided on the crankcase.... | 10/23/1990 |
| 4907546 | Air-cooled type cooling system for engine working machine assembly In an air-cooled type cooling system for an engine working machine assembly in which a working machine such as a generator, a compressor and the like is adapted to be driven by an internal combustion engine, there are provided an air-cooled engine, a work... | 03/13/1990 |
| 4848092 | Heat exchanger for cryogenic refrigerator A cryogenic refrigerator utilizing the Gifford-McMahon cycle that includes a cylinder having a warm end and a cold end, a displacer slidably mounted within the cylinder to form an expansion chamber at the cold end of the cylinder, a regenerator housing ha... | 07/18/1989 |
| 4838214 | Internal combustion engine assembly An internal combustion engine having a sleeve valve wherein the sleeve valve is the cylinder sleeve of a respective cylinder whereby a very simple reciprocation and oscillation of the sleeve valve may be effected by means of a rotary valve which controls ... | 06/13/1989 |
| 4781158 | Cylinder head An air-cooled block cylinder head adapted for mounting on an open-deck cylinder casing of an internal combustion engine. In order to maintain a tight seal of the cylinder head to the cylinder casing, the combustion chamber floor of the cylinder head is de... | 11/01/1988 |
| 4747374 | Cooling air arrangement for air-cooled internal combustion engine An air-cooled internal combustion engine having a series of in-line cylinders with a cooling air blower adjacent an end cylinder. The blower delivers a stream of cooling air in the longitudinal direction of the engine which is redirected by air guide mean... | 05/31/1988 |
| 4729346 | Air-cooled multi-cylinder internal combustion engine Air air-cooled multi-cylinder internal combustion engine with a cylinder row through which cooling air flows transversely to the cylinders. Two guide ribs are cast-on at the cooling air discharge side of each cylinder at a distance to one another which ar... | 03/08/1988 |
| 4726327 | Air guide panel for air-cooled internal combustion engines An air guide panel is provided for an air-cooled internal combustion engine which has closable cleaning openings between the cooling air openings. This air guide panel makes it easier to clean the cooling fins on the cylinder pipes because the cleaning pr... | 02/23/1988 |
| 4696262 | Air-cooled internal combustion engine An air-cooled internal combustion engine is provided with a horizontal partition or wall near the juncture between the cylinder and the cylinder head to obtain a flow of cooling air past the cylinders beneath the partition to heat the driver's area. The p... | 09/29/1987 |
| 4660512 | Air-cooled multi-cylinder internal combustion engine An air-cooled multi-cylinder internal combustion engine includes cylinder heads cast together in a cylinder head casting; the cylinder heads are cooled from the inside by an S-shaped air flow extending between the valves. The cooling air thereby flows-in ... | 04/28/1987 |
| 4656975 | Engine cooling system Mechanism for cooling individual cylinders of an engine, using low pressure air bled from an engine supercharger. Special passage structures are provided to guide and confine the air during its passage across external surfaces of the engine cylinders. Aft... | 04/14/1987 |
| 4633824 | Cooling means for the squish part of an air cooling overhead valve engine The present invention relates to a cooling means for the squish part of an air cooling over head valve engine, comprising a fan disposed in front of said engine for generating cooling wind. A fan case is provided which covers the front side of the fan and... | 01/06/1987 |
| 4633823 | Air-cooled internal combustion engine having cooling ribs and cooling air deflectors An air-cooled, reciprocating piston, internal combustion engine has at least two adjacent cylinder barrels with a plurality of cooling ribs lying substantially perpendicular to the longitudinal axes of the barrels on at least part of the periphery thereof... | 01/06/1987 |
| 4515111 | Air-cooled, reciprocating piston, internal combustion engine with cylinder heads forming arcuate or S-shaped cooling ducts therebetween An air-cooled, reciprocating piston, internal combustion engine which includes at least one cylinder head which includes inlet and exhaust ducts having inlet and exhaust valves with stems, the stems extending parallel to one another, said valve stems bein... | 05/07/1985 |
| 4513703 | Reciprocating piston internal combustion engine A reciprocating piston internal combustion engine, each cylinder of which is provided at the connection point of light metal cylinder head and cylinder sleeve with a sealing element. On that surface which is directed toward the combustion chamber, the sea... | 04/30/1985 |
| 4505238 | Gastight, undetachable connection of two metal parts A positive, gastight, and undetachable connection of two metal parts, especially a cylinder head and a cylinder tube of an internal combustion engine. A groove is located in one of the two parts; this groove, together with a counterpiece of the second par... | 03/19/1985 |
| 4484542 | Four-valve cylinder head of a four-stroke engine A four-valve cylinder head of a four-stroke engine has a body formed with an enlarged material cross-section portion located above a combustion chamber to increase heat exchange surface in the cylinder head. For cooling the cylinder head the latter is fur... | 11/27/1984 |
| 4469060 | Gastight, undetachable connection of two metal parts A positive, gastight, and undetachable connection of two metal parts, especially a cylinder head and a cylinder tube of an internal combustion engine. A groove is located in one of the two parts; this groove, together with a counterpiece of the second par... | 09/04/1984 |
| 4462343 | Cylinder for reciprocating piston engines A cylinder, for reciprocating piston engines, having a ring which is arranged between the cylinder head and the cylinder tube and forms a part of the inner wall of the cylinder. The ring is made of ceramic for heat insulating purposes.... | 07/31/1984 |
| 4445486 | Internal combustion engine The invention relates to an improved internal combustion engine having an air cooled or liquid cooled cylinder head and a piston of low thermal conductivity and low thermal expansion material and a uniform clearance between the cylinder liner and piston a... | 05/01/1984 |
| 4442803 | Light metal cylinder head for internal combustion engines A light metal cylinder head for internal combustion engines, with a metal plate arranged on the cylinder head bottom. The plate has an annular insert on its outer periphery. The annular insert is arranged on the cylinder head and/or cylinder pipe in such ... | 04/17/1984 |
