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| Number | Title | Issue Date |
| 8166931 | Carburetor and two-stroke engine with a carburetor A carburetor has a carburetor housing in which an air passage and a mixture passage are disposed. A barrel valve controls the air passage and the mixture passage. The barrel valve has a mixture passage section and an air passage section formed therein. The air passa... | 05/01/2012 |
| 8104438 | Air intake porting for a two stroke engine A two stroke engine of a particular configuration can have its power output increased by running bigger pistons and using ports in the piston skirt through which to conduct compressed air within the skirt through short passages in the cylinder housing that conduct t... | 01/31/2012 |
| 7963258 | Air intake porting for a two stroke engine A two stroke engine of a particular configuration can have its power output increased by running bigger pistons and using ports in the piston skirt through which to conduct compressed air within the skirt through short passages in the cylinder housing that conduct t... | 06/21/2011 |
| 7895978 | Non-polluting two-stroke engine with air-cooled piston A two-stroke internal combustion engine has at least one cylinder having a bore diameter, a piston slip-fit in the cylinder, the piston having an upper portion and a lower portion and a central portion of significantly less than the bore diameter, providing an annul... | 03/01/2011 |
| 7784437 | Air intake porting for a two stroke engine A two stroke engine of a particular configuration can have its power output increased by running bigger pistons and using ports in the piston skirt through which to conduct compressed air within the skirt through short passages in the cylinder housing that conduct t... | 08/31/2010 |
| 7694658 | Two-stroke engine, especially for landcraft, watercraft, or aircraft models Disclosed is a two-stroke engine, especially for landcraft, watercraft, or aircraft models, comprising a piston which can be moved up and down within a bush, defines a combination chamber at the top, and is connected to a crankshaft via a con-rod at the bottom, said... | 04/13/2010 |
| 7578268 | Air intake porting for a two stroke engine A two stroke engine of a particular configuration can have its power output increased by running bigger pistons and using ports in the piston skirt through which to conduct compressed air within the skirt through short passages in the cylinder housing that conduct t... | 08/25/2009 |
| 7574984 | Two-stroke internal combustion engine A 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 inlet is equipped with a restriction va... | 08/18/2009 |
| 7565886 | 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 ( | 07/28/2009 |
| 7559299 | Monolithic cylinder-crankcase A cylinder-crankcase is disclosed that includes a cylinder block having a cylinder head for receiving a spark plug. The cylinder-crankcase also includes a crankcase and a crank arm for supporting a crankshaft. The cylinder block, cylinder head, crankcase and crank a... | 07/14/2009 |
| 7543554 | Two-stroke motor with an improved transfer port In order to provide a two-stroke motor, in particular for a portable, hand-guided working device with a combustion space formed in a cylinder and a piston guided in the cylinder so that it performs a lifting movement, at least one transfer port is provided which is ... | 06/09/2009 |
| 7536982 | Two-cycle combustion engine of air scavenging type An engine including first scavenging passages for fluidly connecting between a combustion chamber and a crank chamber through bearings for the crankshaft, second scavenging passages fluidly connecting directly between the combustion chamber and the crank chamber, a ... | 05/26/2009 |
| 7520253 | Two-stroke internal combustion engine A cylinder bore (4) of a two-stroke internal combustion engine (1) has first scavenging ports (12) and second scavenging ports (13) inside. The first scavenging ports (12) are nearer to an exhaust port (11) of the engine ( | 04/21/2009 |
| 7516725 | Two-stroke cycle engine A two-stroke cycle engine using a preceding air-layer for scavenging and having a scavenger passage connected to a branching scavenger passage opened to a scavenging port and a connecting passage linking the air and fuel passages so that negative pressure in the air... | 04/14/2009 |
| 7503292 | System for a two-stroke combustion engine with controlled additional air The present invention relates to a system (1) for supplying an air-fuel mixture to a two-stroke internal combustion engine (2), comprising a carburettor (3) having a throttle valve (4) and a choke valve (5). The system further has ... | 03/17/2009 |
| 7469666 | Two-stroke engine A crankcase scavenged two-stroke engine (1) comprises a cylinder (15) including scavenging ports (31, 31′) and at least one exhaust port, a piston (13), a connecting rod (17), a crankshaft (18) and a generally sealed crank... | 12/30/2008 |
| 7458344 | Motorcycle engine method and apparatus An assembly modification of an existing two-stroke single cylinder 43 CC to 52 CC combustion engine. The assembly substantially increases the horsepower of the stock two-stroke engines. The modifications include using a reed valve kit which is modified to connect to... | 12/02/2008 |
| 7441518 | Internal combustion engine and method of operating same An internal combustion engine having an intake channel that opens into a crankcase. A first fuel channel opens into the intake channel to supply fuel thereto as a function of underpressure in the intake channel. An auxiliary channel opens into a transfer channel tha... | 10/28/2008 |
| 7429033 | Scavenging carburetor A scavenging carburetor having an improved relationship between scavenging air flow and fuel-and-air flow to an engine over its range of operating conditions. The carburetor has a butterfly throttle valve and a plug-type scavenging valve. Levers are attached to supp... | 09/30/2008 |
| 7415949 | Cylinder for a crankcase scavenged internal combustion engine A cylinder (1) for a crankcase scavenged two-stroke engine, comprising a cylinder bore (2) with centre line (12) and on opposite sides of the cylinder located closed transfer ducts (3, 3′), which cylinder (1) has an underside ( | 08/26/2008 |
| 7407153 | Carburettor A carburettor for a two stroke engine includes a flow duct including rich and lean flow passages (160, 150) in parallel, through which, in use, air flows in a flow direction and which are separated by substantially planar partition (130). At least one ... | 08/05/2008 |
| 7395801 | Two-cycle combustion engine To provide a two cycle combustion engine utilizing a connecting structure of a shape that can be formed inexpensively with a simple process to enable the efficiency of cooling of the cylinder block to be maintained at a high level and, also, that can firmly connect ... | 07/08/2008 |
| 7389754 | System for a two-stroke crankcase scavenged combustion engine The present invention relates to a system (1) for supplying an air-fuel mixture to a two-stroke internal combustion engine cylinder (2), comprising a carburettor (3) having a throttle valve (4) and usually a choke valve. The system furthe... | 06/24/2008 |
| 7380526 | Power tool A power tool has a working tool that is driven by a two-stroke engine that has a cylinder and a piston reciprocating within the cylinder and delimiting a combustion chamber in the cylinder. The two-stroke engine has a crankcase with a rotatably supported crankshaft ... | 06/03/2008 |
| 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 |
| 7357377 | Carburettors A carburettor is connected into the inlet duct (48) of an internal combustion engine. The inlet duct is divided by a dividing wall (64) into a rich passage (42) and a lean passage (44). The carburettor includes a fuel chamber (4) a... | 04/15/2008 |
| 7331324 | Crankshaft rotary valve A crankshaft rotary valve that controls fluid flow between a port located circumferentially on the crankshaft and a crankcase chamber formed by a piston, cylinder, crankcase and crankshaft. As the crankshaft rotates, a channel in the crankshaft communicates with the... | 02/19/2008 |
| 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 |
| 7331314 | Two-stroke engine A two-stroke engine has a cylinder with a combustion chamber that is delimited by a reciprocating piston that drives with a connecting rod a crankshaft rotatably supported in a crankcase. In predetermined positions of the piston, the crankcase is connected by at lea... | 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 |
| 7322322 | Stratified-scavenging two-stroke internal combustion engine In a stratified-scavenging two-stroke internal combustion engine, air-fuel mixture outlets (14b) and air outlets (15b) are provided on either side of a cylinder (3), and the air-fuel mixture outlets (14b) and the air ... | 01/29/2008 |
| 7299773 | Cylinder for a two stroke engine A cylinder for a two-stroke engine has a cylinder wall defining a cylinder interior. A cylinder head closes of a combustion chamber in the cylinder interior. An exhaust is connected to the cylinder interior. At least one transfer passage having a transfer port opens... | 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 |
| 7267326 | Automatic priming system An automatic priming system for internal combustion engines, which is operable to prime the carburetor of the engine at engine cranking speeds, and is automatically disabled after the engine starts. The automatic priming system is driven by pressure fluctuations wit... | 09/11/2007 |
| 7261282 | Carburetor with intermediate throttle valve blocking position A carburetor including a frame having a first air/fuel channel and a second air channel; and a throttle valve assembly connected to the frame and having two valve sections. Each valve section is located in a respective one of the channels. A second one of the valve ... | 08/28/2007 |
| 7261281 | Carburetor A carburetor including a mixture channel and an air channel that are separated from one another, wherein a fuel opening opens into the mixture channel. A throttle element is rotatable about an axis of rotation that extends transverse of the direction of flow in the ... | 08/28/2007 |
| 7257993 | Method of operating a single cylinder two-stroke engine A method operates a single cylinder two-stroke engine having a cylinder wherein a combustion chamber is formed which is delimited by a piston. The piston drives a crankshaft rotatably journalled in a crankcase. In the method, fuel and combustion air are supplied to ... | 08/21/2007 |
| 7258327 | Carburetor A carburetor (18) has a carburetor housing (17) wherein an intake channel (19) is guided having a flow cross section of less than 3 cm2. The carburetor (18) includes a partition wall (11) which partitions the intake chan... | 08/21/2007 |
| 7243621 | Two-stroke engine A two-stroke engine (1, 31, 41, 51) includes a cylinder (2) having a combustion chamber (5). The combustion chamber (5) is delimited by a piston (7) which drives a crankshaft (25) rotatably journalled in a crankcase (3 | 07/17/2007 |
