Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7762220 | Valve assembly for a two-stroke engine A two-stroke internal combustion engine is disclosed having first and second cylinders having respective exhaust ports. A valve assembly comprises at least one valve actuator. First and second valves are operatively connected to the at least one valve actuator. The ... | 07/27/2010 |
| 7484482 | Valve assembly for a two-stroke engine A valve assembly suitable for use with an exhaust port of a two-stroke internal combustion engine is disclosed. The valve assembly has a valve actuator including a diaphragm and a pressure chamber, and a valve operatively connected to the actuator. The pressure cham... | 02/03/2009 |
| 7367295 | Exhaust control valve for internal combustion engine An exhaust valve assembly for a two stroke internal combustion engine having a cylinder with at least one main exhaust port and one auxiliary exhaust port is disclosed. The assembly comprises a main exhaust valve for at least partially closing the main exhaust port,... | 05/06/2008 |
| 7331322 | Intake duct structure An intake duct structure having an intake path extending forwardly from a cleaner box, penetrating through an area near a head pipe of a vehicle body frame, and opening at a front end portion of a front cowl. During low speed operation of the engine, an intake valve... | 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 |
| 7303037 | Snowmobile four-cycle engine arrangement A snowmobile four-cycle engine arrangement, includes: a four-cycle engine arranged in an engine compartment formed in the front body of a snowmobile with its crankshaft laid substantially parallel to the body width and having a cylinder case inclined forwards with r... | 12/04/2007 |
| 7258087 | 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... | 08/21/2007 |
| 7246577 | Reciprocating piston engines A reciprocating piston engine has a cylinder with a transfer port and an exhaust port, wherein the transfer port and exhaust port are at least partially coincident and are provided with a port valve. The engine includes a pump having a divided chamber therein, one s... | 07/24/2007 |
| 7243490 | 4-cycle engine for motorcycle A 4-cycle engine for a motorcycle has a secondary-air supplier for supplying secondary air to exhaust ducts. The engine includes a recess, which is depressed toward the engine, on a cylinder-head cover for holding a control valve of the secondary-air supplier. The r... | 07/17/2007 |
| 7213544 | Exhaust-outlet control for 2-stroke engine An exhaust valve assembly for a two stroke internal combustion engine having a cylinder with at least one main exhaust port and one auxiliary exhaust port is disclosed. The assembly comprises a main exhaust valve for at least partially closing the main exhaust port,... | 05/08/2007 |
| 7204331 | Snowmobile four-cycle engine arrangement A snowmobile four-cycle engine arrangement, includes: a four-cycle engine arranged in an engine compartment formed in the front body of a snowmobile with its crankshaft laid substantially parallel to the body width and having a cylinder case inclined forwards with r... | 04/17/2007 |
| 7198039 | Valve control device reducing noise A valve control device corrects a change rate of an opening degree of a valve in accordance with engine rotation speed when deposit elimination operation is performed. The valve control device corrects an inclination between a positive maximum opening degree and a n... | 04/03/2007 |
| 7198011 | Internal combustion engine There is provided a two stroke internal combustion engine comprising a cylinder and a piston. The cylinder has a cylinder head, a wall and a crankcase. The wall extends between the cylinder head and the crankcase. The cylinder head has a first opening and a second o... | 04/03/2007 |
| 7198127 | Snowmobile four-cycle engine arrangement A snowmobile four-cycle engine arrangement, includes: a four-cycle engine arranged in an engine compartment formed in the front body of a snowmobile with its crankshaft laid substantially parallel to the body width and having a cylinder case inclined forwards with r... | 04/03/2007 |
| 7185632 | Internal combustion engine and method of operating the same An internal combustion engine (20) has a cylinder (1) wherein a piston (2) is mounted. The piston (2) drives a crankshaft (10) which is rotatably journalled in a crankcase (11). The piston (2) delimits a combustion ch... | 03/06/2007 |
| 7168517 | Throttle valve opening control device and layout structure thereof A throttle valve opening control device includes a drum which is connected to a throttle grip by a wire, an input shaft which is integrally mounted in the drum, an output shaft which is connected to the input shaft by a power transmission device, a link mechanism wh... | 01/30/2007 |
| 7152557 | Apparatus for adjusting an operational point of an engine An exhaust valve assembly may include a diaphragm connected to a restricting member. The diaphragm may be configured to change a position of the restricting member based on a pressure on a first side of the diaphragm. A spring may abut a second side of the diaphragm... | 12/26/2006 |
| 7150273 | Exhaust manifold arrangement A passageway is provided between branches of a multi-branch exhaust manifold to reduce the amount of backflow (iEGR) into the cylinders at low engine speeds. The passage is located upstream of the turbocharger and can be at the part of the manifold where the branche... | 12/19/2006 |
| 7146806 | Internal combustion engine cylinder and muffler assembly with catalytic converter A two cycle internal combustion engine cylinder having a piston chamber. The cylinder includes transfer ports; and an exhaust port divided into at least two sections. A first one of the sections has an aperture at the piston chamber with a top surface located closer... | 12/12/2006 |
| 7131406 | Two-cycle engine having scavenging A two-cycle engine in a portable, manually-guided implement, such as a power chain saw, a cut-off machine, a brush cutter, or the like, is provided. The cylinder has a combustion chamber that is delimited by a reciprocating piston that via a connecting rod drives a ... | 11/07/2006 |
| 7111701 | Motorcycle A motorcycle includes an axle of a rear wheel supported for rotation at a rear end of a swing arm. The swing arm is supported at a front end portion thereof for rocking motion on a vehicle body frame. A rear end exhaust portion of an exhaust system connected to a cy... | 09/26/2006 |
| 7100550 | Two-stroke engine transfer ports A two-stroke internal combustion engine including a cylinder; and a piston movably mounted in the cylinder. The cylinder includes an exhaust port and transfer ports. The transfer ports include a first pair of the transfer ports disposed closer to the exhaust port th... | 09/05/2006 |
| 7096110 | Electronic control apparatus for vehicle and control method for vehicle In the case where it is diagnosed whether or not the leakage occurs in a fuel vapor purge system from a standby time has elapsed after an engine operation was stopped, the power supply to processing circuits unnecessary for the leakage diagnosis is shut off, thereby... | 08/22/2006 |
| 7036619 | Snowmobile four-cycle engine arrangement A snowmobile four-cycle engine arrangement, includes: a four-cycle engine arranged in an engine compartment formed in the front body of a snowmobile with its crankshaft laid substantially parallel to the body width and having a cylinder case inclined forwards with r... | 05/02/2006 |
| 7000594 | Electronic control unit for two-cycle internal combustion engine with exhaust control valve An electronic control unit for controlling a fuel injection amount of a two-cycle internal combustion engine with an exhaust control valve wherein the electronic control unit comprises an injection amount determination means for determining the fuel injection amount... | 02/21/2006 |
| 6945211 | Cylinder head of an internal combustion engine In a cylinder head of an internal combustion engine, a plug hole for mounting an ignition plug is formed along a cylinder axis and an intake port and an exhaust port are respectively formed at both sides of the plug hole while sandwiching the cylinder axis therebetw... | 09/20/2005 |
| 6912987 | Drysump lubrication type engine A drysump lubrication type engine is integrally connected at a crankcase thereof with an oil tank. A magnet coil coaxially mounted on an extension line of a crankshaft is covered by the oil tank and accommodated between the oil tank and the engine. ... | 07/05/2005 |
| 6895908 | Exhaust timing controller for two-stroke engine A method and apparatus that permits engine system control such as exhaust valve timing without the use of separate load sensors from the output of a single engine timing sensor. ... | 05/24/2005 |
| 6886507 | Exhaust valve for two-cycle engine An exhaust valve for a two-cycle engine. The exhaust valve includes a valve body and an actuator. The valve body, in turn, includes a valve insert and a shaft extending from the valve insert. A substantially axial slot may be defined on an upper surface of the valve... | 05/03/2005 |
| 6874454 | Two-stroke cycle for internal combustion engines A two-stroke cycle is applicable to classical internal combustion engines (piston-rod-crankshaft) as well as to engines with a two-sided piston. At least one pair of cylinders of which one is a compressor (pump) cylinder and other is an engine cylinder. The compress... | 04/05/2005 |
| 6842978 | Cylinder head and crankcase manufacturing and assembly techniques A method of manufacturing a cylinder head and crankcase for a small engine. A crankcase and a cylinder head are cast to close tolerances and include as-cast mounting flanges, which are assembled in face-to-face contact by employing self-threading screws. Bearing rec... | 01/18/2005 |
| 6810839 | Control device for controlling control motor of internal combustion engine The control device for a control motor of an engine has: a control information output unit for detecting an operational state of the engine as control information; target value computing unit for obtaining a target value of the motor corresponding to the control inf... | 11/02/2004 |
| 6808034 | Snowmobile exhaust system A snowmobile has a frame construction that defines a recess above a drive unit. The recess is formed by a horizontal member and a pair of vertical members. A portion of the exhaust system extends within the recess at a location above the drive unit. An exhaust syste... | 10/26/2004 |
| 6807928 | Control device for a control motor of an internal combustion engine The operational state of the engine is detected and the target value of the motor is computed corresponding to the operational state (step S1); a current value of the motor is obtained (step S2); and the width of a stop target area that is a determinat... | 10/26/2004 |
| 6802383 | Snowmobile exhaust system A snowmobile has a frame construction that defines a recess above a drive unit. The recess is formed by a horizontal member and a pair of vertical members. A portion of the exhaust system extends within the recess at a location above the drive unit. ... | 10/12/2004 |
| 6782850 | Two stroke engine having reduced height pistons Modification to the current two-stroke cycle internal combustion engine, using reduced height piston constructed solidly with piston rods and having rotary valves installed in the transfer and exhaust ports. The piston pre-compresses the fuel-air mix in its lower pa... | 08/31/2004 |
| 6748908 | Thermal exhaust throttle An exhaust throttling system for engines having individual cylinders with at least one exhaust port to exhaust combustion gases from the cylinder chamber, the system including at least one sleeve configured to be slidably attached to the cylinder and selectively cov... | 06/15/2004 |
| 6715455 | Internal combustion engine An internal combustion engine with at least one control element for variation of the flow cross-section of a charge exchange passage, which control element is automatically adjustable in accordance with the engine mode by means of an actuating member and a connectin... | 04/06/2004 |
| 6647933 | Electronic control unit for two-cycle internal combustion engine An electronic control unit for a two-cycle internal combustion engine including an exhaust control valve which adjusts exhaust timing, a valve controller which controls the exhaust control valve, and a reversal controller which controls reversing a rotati... | 11/18/2003 |
| 6622671 | Engine exhaust control A snowmobile is powered by an internal combustion engine. The engine has an exhaust timing control valve, a control unit and a generator. The control unit determines the positioning of the control valve as a function of engine speed. Additionally, the con... | 09/23/2003 |
