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| Number | Title | Issue Date |
| 8181611 | Stratified scavenging two-cycle engine Provided is a laminar-scavenging two-cycle engine, which can have a higher laminar-scavenging effect than that of the laminar-scavenging two-cycle engine of the prior art and which can expect drastically excellent effects on the stabilization of combustion and on th... | 05/22/2012 |
| 7634980 | Crankcase scavenged two-stroke internal combustion engine having an additional air supply A crankcase scavenged two-stroke internal combustion engine (1) having an additional air supply (2) arranged to its transfer ducts (3), connecting a crankcase volume (4) and a transfer port (5). There is at least one recess (6, ... | 12/22/2009 |
| 7373906 | Power tool A power tool is driven by a two-stroke engine. The two-stroke engine has a cylinder and a piston reciprocating within the cylinder. The cylinder has a combustion chamber delimited by the piston. The two-stroke engine has a crankcase and a crankshaft rotatably suppor... | 05/20/2008 |
| 7363888 | Two-stroke engine A two-stroke engine has a cylinder and a piston reciprocating in the cylinder and delimiting a combustion chamber. The piston has at least one piston recess. A crankshaft is rotatably arranged in a crankcase connected to the cylinder. A connecting rod connects pisto... | 04/29/2008 |
| 7331315 | Two-stroke engine with fuel injection A two-stroke internal combustion engine is provided with a fuel injector. The two-stroke internal combustion engine may have at least one transfer passage, an air channel, and a fuel injector. The transfer passage is between a crankcase and a combustion chamber of t... | 02/19/2008 |
| 7325528 | Method of operating a single cylinder two-stroke engine The invention is directed to a method for operating a two-stroke engine having a cylinder in which a combustion chamber is formed and which includes devices for metering fuel and supplying combustion air as well as an ignition device for igniting a mixture in the co... | 02/05/2008 |
| 7318404 | Piston engine A piston engine has a crank assembly, a piston assembly, a crank case assembly and a cylinder head assembly. The crank assembly has a central axle, two counterweight blocks and a crank axle. The central axle has two connecting segments and two flanges. The flanges a... | 01/15/2008 |
| 7299772 | Cooling gallery fan assembly for a piston A piston for an internal combustion engine defining an axis of motion and including an annular cooling gallery defined within the piston. The cooling gallery extends annularly about the axis of motion of the piston. A plurality of annularly spaced fan blades is posi... | 11/27/2007 |
| 7293536 | Two-cycle combustion engine To provide a two cycle combustion engine provided with scavenging passages of a structure, which is effective to minimize a deposit of fuel contained in an air/fuel mixture and allows the mixture to be injected into a combustion chamber so as to avoid the blow-off o... | 11/13/2007 |
| 7243622 | Two-stroke internal combustion engine A two-stroke internal combustion engine (1) includes one pair or two pairs of scavenging passageways (31, 32) of reverse flow system where scavenging outlet ports (31b, 32b) are opened to the cylinder bore (10a... | 07/17/2007 |
| 7228825 | Two-stroke engine assembly A two-stroke engine includes an air channel for supplying substantially fuel-free combustion air and a mixture channel for supplying an air/fuel mixture. The air channel and the mixture channel connect the cylinder of the two-stroke engine to an air filter. A sectio... | 06/12/2007 |
| 7225769 | Two-stroke cycle engine This invention concerns a two-stroke cycle engine, more specially it concerns a two-stroke cycle engine using a preceding air-layer for scavenging. It has a scavenger passage connected to a branching scavenger passage opened to said scavenging port. The engine has a... | 06/05/2007 |
| 7165597 | Insert core and method for manufacturing a cylinder for internal combustion engine by making use of the insert core There is provided a method of cast molding a cylinder for an internal combustion engine by making use of an insert core, which makes it possible to rationally form the chamfered portions at the rim portion, on the cylinder bore side, of the scavenging ports, the suc... | 01/23/2007 |
| 7128031 | Lead air control apparatus of stratified scavenging two-cycle engine In an insulator (21) inserted between a carburetor (30) and a cylinder (3) for a purpose of insulating heat, there are formed an intake passage (22) connected to the carburetor (30), and a pair of first air passages (23) con... | 10/31/2006 |
| 7082910 | Two-stroke internal combustion engine Crankcase scavenged two-stroke internal combustion engine (1), in which a piston ported air passage is arranged between an air inlet (2) and the upper part of a number of transfer ducts (3, 3′). The air passage is arranged from an air inlet ( | 08/01/2006 |
| 7066119 | Two-stroke engine A two-stroke engine includes a scavenging passage opening in a combustion chamber in a scavenging stroke to fill the combustion chamber with a working gas containing a fuel; and a scavenge filling chamber communicating through a communicating port with the scavengin... | 06/27/2006 |
| 7028649 | High flow reed valve assembly for a two-cycle engine A reed valve assembly in certain embodiments of the present teachings may include one or more of the following features: (a) a W shaped reed cage assembly having at least two reed cages, each reed cage having outer air ports and inner air ports wherein the inner air... | 04/18/2006 |
| 7021252 | Sas piston channel for optimum air scavenging A piston channel is provided for a piston of an air scavenging internal combustion engine. The channel extends radially inward partially around a circumference of a piston body. An edge wall of the channel is sloped towards a wrist pin aperture in the piston to impr... | 04/04/2006 |
| 6976458 | Two-stroke engine A two-stroke engine (1) has a combustion chamber (3) configured in a cylinder (2). The combustion chamber (3) is delimited by a reciprocating piston (5) and drives a crankshaft (7) which is rotatably journalled in a crankcas... | 12/20/2005 |
| 6973899 | Stratified air scavenged two-cycle engine with air flow An SAS two-cycle engine has a cylinder block that has a bore with at least one scavenging port and at least one fresh air port therein. The bore extends to a crankcase. A piston of the engine is located within the bore and separates a combustion chamber of the bore ... | 12/13/2005 |
| 6899067 | Two-stroke engine and method of operating the same A two-stroke engine, especially for a portable handheld work apparatus, includes a combustion chamber configured in a cylinder. The combustion chamber is delimited by a piston which moves upwardly and downwardly. Combustion air is supplied to the engine via an air c... | 05/31/2005 |
| 6877723 | Valve for control of additional air for a two-stroke engine Flange assembly for supporting a structure that provides scavenging air supply to an internal combustion engine at the carburetor to the engine. The assembly includes a thin-body flange that is configured to be abuttingly installed upon an end surface of the carbure... | 04/12/2005 |
| 6851402 | Two-stroke engine and method for operating the same A two-stroke engine (1) for a work apparatus includes a combustion chamber (3) configured in a cylinder (2). The engine includes a piston (5, 21) which drives a crankshaft (7) via a connecting rod (6). The crankshaft (7 | 02/08/2005 |
| 6712029 | Cylinder for an internal combustion engine The invention refers to a cylinder (1) for a two-stroke, crankcase scavenged combustion engine, comprising an inlet pipe (10) for air/fuel mixture, at least one transfer port (17), and at least one outer connecting port (18) intended to b... | 03/30/2004 |
| 6668770 | Two-stroke interal combustion engine Crankcase scavenged two-stroke internal combustion engine, in which at least one piston ported air passage, with length Lai, is arranged between an air inlet (2) and each scavenging port (31, 31') of a number of transfer ducts (3, 3'), with len... | 12/30/2003 |
| 6598568 | Two-stroke engine having charge stratification A two-stroke engine having charge stratification for portable, manually guided implements is provided. Formed in a cylinder is a combustion chamber that is delimited by a reciprocating piston that by means of a connecting rod drives a crankshaft in a cran... | 07/29/2003 |
| 6595169 | Internal combustion engine having adjustable CO characteristic curve An internal combustion engine, for example a two-stroke engine having scavenging collection, is provided. The combustion chamber formed in the cylinder is delimited by a reciprocating piston. A fuel/air mixture prepared in the Venturi section of a diaphra... | 07/22/2003 |
| 6581554 | Internal combustion engine having a diaphragm carburetor and adjustable CO level An internal combustion engine, especially a two-stroke engine in manually-guided implement, is provided. A piston that is disposed in a cylinder delimits a combustion chamber and by means of a connecting rod drives a crankshaft disposed in a crankcase. A ... | 06/24/2003 |
| 6491005 | Die cast metal cylinder assembly for a two-stroke engine A cylinder is produced of die cast metal and is for a two-stroke engine in a portable handheld work apparatus such as a motor chain saw. A combustion chamber (3) is formed in the cylinder (2) and this combustion chamber is delimited by a piston (5). In th... | 12/10/2002 |
| 6491006 | CHAIN SAW HAVING A TWO-CYCLE OR TWO-STROKE ENGINE, AND A HAND-HELD POWER TOOL SUCH AS A CHAIN SAW, TRIMMER, OR POWER CUTTER HAVING A TWO-CYCLE OR TWO-STROKE ENGINE, AND A METHOD FOR THE CONSTRUCTION THEREOF The present invention relates to a chain saw having a two-cycle or two-stroke engine. The present invention also relates to a hand-held power tool such as a chain saw, trimmer, or power cutter having a two-cycle or two-stroke engine. The present invention... | 12/10/2002 |
| 6367432 | Two-stroke cycle internal combustion engine A two-stroke cycle internal combustion engine has a quaternary Schnurle-type scavenging system that is configured such that the capacity of a pair of second scavenging passageways are made larger than the capacity of a pair of first scavenging passageways... | 04/09/2002 |
| 6352058 | Air scavenging two-stroke cycle engine It is an object of the invention to provide an air scavenging two-stroke cycle engine capable of smoothly supplying fuel-air mixture into a combustion chamber, reducing the number of parts to thereby reduce cost, and suppressing the blow-by of the fuel-ai... | 03/05/2002 |
| 6293234 | Two-stroke internal combustion engine having improved fuel porting The port-controlled two-stroke engine includes a combustion chamber, a crankcase containing a combustible mixture, a cylinder, a piston working in the cylinder, an intake duct terminating in an intake port in the cylinder wall for delivering the combustib... | 09/25/2001 |
| 6263841 | Two stroke engine having reduced emissions A simple, piston ported, two stroke engine having low weight, small size, low fuel consumption, enhanced power output and reduced exhaust emissions. A rotary exhaust valve adjacent to the cylinder exhaust ports closes the exhaust at completion of cylinder... | 07/24/2001 |
| 6240886 | Stratified scavenging two-cycle engine The present invention is a stratified scavenging two-cycle engine which can make exhaust gas cleaner. For this purpose, in a stratified scavenging two-cycle engine, which includes a scavenging flow passage (3) to connect a cylinder chamber (4a) and a cran... | 06/05/2001 |
| 6199521 | Fuel direct injection type two cycle internal combustion engine A fuel direct injection type two cycle internal combustion engine including a high output pressure fuel pump having a pump drive shaft connected thereto and disposed in a vacant space in an engine body.... | 03/13/2001 |
| 6135071 | Two-stroke internal combustion engine A two-stroke internal combustion engine having a crankcase provided with a crank chamber, a suction port which opens to the crank chamber, a scavenging passage opening into the crank chamber, and a crankshaft is provided with a flow control surface formed... | 10/24/2000 |
| 6085703 | Stratified scavenging two-cycle engine The present invention is a stratified scavenging two-cycle engine which has a more compact structure. The stratified scavenging two-cycle engine includes a scavenging flow passage (3) for connection between a cylinder chamber (4a) and a crank chamber (1a)... | 07/11/2000 |
| 6062180 | Device for increasing crankcase compression in an internal combustion engine A device for increasing crankcase compression in an internal combustion engine. The device includes a holder having an annular peripheral wall joined to an end wall. The holder is mounted on a crankshaft of the engine, between a main bearing and a crank p... | 05/16/2000 |
| 5934230 | Method for supplying fuel to a combustion engine, and combustion engine The invention relates to a method for supplying fuel to a combustion engine which has an air inlet provided with a gas valve and an output shaft and wherein a fuel line in which a fuel supply device is arranged debouches into the air inlet. The method com... | 08/10/1999 |
