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| Number | Title | Issue Date |
| 8091519 | Paired-piston linear engine A linear internal combustion engine is disclosed having a cylinder defining an intake port proximate a first end thereof and an exhaust port proximate a second end thereof. First and second pistons insert into opposite ends of the cylinder. Each piston is coupled to... | 01/10/2012 |
| 7779795 | Valve system for opposed piston engines The valve system for opposed piston engines essentially comprises a single poppet valve opening into the common combustion chamber between the two opposed pistons of each piston and cylinder pair. The engine for which the mechanism is adapted includes a rotating int... | 08/24/2010 |
| 7513224 | Split-cycle aircraft engine A split-cycle aircraft engine includes a crankshaft rotatable about a crankshaft axis. A power piston is slidably received within a power cylinder and is operatively connected to the crankshaft such that the power piston reciprocates through an expansion stroke and ... | 04/07/2009 |
| 7434550 | Internal combustion engine An improved configuration for an opposing piston-opposing cylinder (“OPOC”) internal combustion engine with a single camshaft to reduce friction between the pistons and the cylinder walls during the combustion phase of the engine cycle. The improvements are pres... | 10/14/2008 |
| 7434549 | Opposed double piston internal combustion engine An internal combustion engine including at least one engine cylinder includes a cylinder cavity with first and second stopping members interconnected by a cylinder wall, the cylinder further includes two piston members slidably moveable within said cylinder cavity a... | 10/14/2008 |
| 7387093 | Internal combustion engine with sidewall combustion chamber and method An internal-combustion, reciprocating-piston engine operating on the Otto cycle and associated method are provided where a sidewall combustion chamber is employed that is capable of receiving highly-compressed air or a mixture of any gas and fuel from a cylinder whi... | 06/17/2008 |
| 7360511 | Opposed piston engine A two-cycle, opposed piston engine with side-mounted crankshafts and cylinders isolated from mechanical stresses of the engine includes tailored cooling of cylinders and symmetrical cooling of the interior surfaces of piston crowns. Each opposed piston includes a co... | 04/22/2008 |
| 7328672 | Radial impulse engine, pump, and compressor systems, and associated methods of operation Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In t... | 02/12/2008 |
| 7325517 | Radial impulse engine, pump, and compressor systems, and associated methods of operation Radial impulse engine, pump, and compressor systems are disclosed herein. In one embodiment of the invention, an engine includes a first end wall portion spaced apart from a second end wall portion to at least partially define a combustion chamber therebetween. In t... | 02/05/2008 |
| 7293534 | Premixed charge compression ignition engine and reciprocating generator having the same The object of the present invention is to provide a premixed charge compression ignition (PCCI) engine. The PCCI engine has a fuel injector (22) in a suction manifold (8) to prepare a premixed charge of fuel and air and induces a natural ignition of th... | 11/13/2007 |
| 7210445 | Piston-cam engine A piston-cam engine includes a drive cylinder, a drive piston operably disposed therein having a piston head and a shaft, a support frame having a drive shaft rotatably movably connected thereto, a cam connected to the drive shaft having a peripheral surface and hav... | 05/01/2007 |
| 7182046 | Deformable combustion chamber-based internal combustion engine and generator A reciprocating internal combustion engine is based on Homogenous Charge Compression Ignition (HCCI) that occurs in a deformable, resonant combustion chamber and that is coupled mechanically to efficient, resonant, electro-mechanical transducers acting as motors and... | 02/27/2007 |
| 7156056 | Two-cycle, opposed-piston internal combustion engine In a two-cycle, opposed-piston internal combustion engine with optimized cooling and no engine block, the opposed pistons are coupled to a pair of crankshafts by connecting rods that are subject to substantially tensile forces acting between the pistons and the cran... | 01/02/2007 |
| 7124716 | Internal combustion engine using opposed pistons An internal combustion engine having a cylindrical outer housing with inner cylindrical cylinders defining power cylinders circumferentially spaced in the engine. Each of the cylinder(s) has opposed intake and exhaust pistons. The intake and exhaust pistons use air ... | 10/24/2006 |
| 7114485 | Over expanded two-stroke engines A method for combusting fuel in an engine involving decreasing a first volume of a homogeneous lean fuel/air charge to a second volume, in two stages, while increasing the pressure and temperature of that charge (a compression process having a chosen compression rat... | 10/03/2006 |
| 7004120 | Opposed piston engine A four-stroke opposed piston engine includes a rotating cylinder with a circumference and an aperture defined through the circumference, first and second opposing pistons, optional first and second opposing cylindrical spacers, first and second opposing piston caps,... | 02/28/2006 |
| 6966280 | Compression pulse starting of a free piston internal combustion engine having multiple cylinders A method for starting a free piston internal combustion engine that includes a first pair of mutually connected pistons, a second pair of mutually connected pistons, a first piston of each pair located in a first cylinder, a second piston of each pair located in a s... | 11/22/2005 |
| 6938588 | Controllable combustion method and device A method and device for controllably combusting combustible material, including a combustion device comprising an elongate combustion tube having an inlet section including an inlet for combustible material, an ignition section, including an igniter displaced along ... | 09/06/2005 |
| 6904878 | Internal combustion engine with novel fuel/air delivery system Blower forces fuel/air mixture into bore of cylinder head against small diameter piston of compound piston assembly, forcing assembly down in engine cylinder, permitting fuel/air mixture to enter main cylinder of engine in which it is ignited. Exhaust forces assembl... | 06/14/2005 |
| 6722322 | Internal combustion engine An internal combustion engine including at least one engine cylinder, the cylinder includes a cylinder cavity with first and second cylinder heads which are interconnected by a cylinder wall, the cylinder further includes a piston member which is slidably movement w... | 04/20/2004 |
| 6415747 | Two stroke, multiple cylinder engine for small vehicle An improved two stroke, multiple cylinder engine having combustion chambers and a single exhaust conduit for discharging exhaust gasses from the combustion chambers. In accordance with one feature of the invention, the combustion chambers are unified to t... | 07/09/2002 |
| 6393841 | Internal combustion engine with dual exhaust expansion cylinders An Internal combustion engine is provided having separately designated combustion and exhaust powered cylinders, for implementing a dual exhaust expansion system which derives additional power from the combustion exhaust gases of each cylinder. The piston... | 05/28/2002 |
| 6250263 | Dual piston cylinder configuration for internal combustion engine An internal combustion engine 10 is provided having at least one pair of cylinders 30, 31 which overlaps to form one enclosure 20. The two cylinders 30, 31 have central axes 2, 4 which are offset. The reciprocally-offset cylinders 30, 31 are joined to for... | 06/26/2001 |
| 6148776 | Bearing arrangement The present invention is for a bearing arrangement by a device for transmission of power where linear motion is transmitted into rotating motion or the like. The bearing means at the cam disc machine according to the invention is so made that the rotating... | 11/21/2000 |
| 6142112 | Sparking device The present invention is for a new kind of sparking device. It is especially suitable for counterstroke engines in which two pistons are working against each other in a common cylinder bore. The invention is for a sparking device for combustion engines wh... | 11/07/2000 |
| 6092493 | Power machine valve control The present invention is for the kind of power machines, engines or compressors which have two or more pistons which work against each other preferably with a common combustion or compression chamber in a stationary cylinder and where the power is transmi... | 07/25/2000 |
| 6082313 | Power machine lubrication The present invention is for the kind of power machines, engines, pumps or compressors which have two or more pistons which work against each other, preferably with a common combustion chamber or corresponding, in a stationary cylinder and where the power... | 07/04/2000 |
| 6079377 | Air cooled power machine The present invention is for the kind of power machine, engines, pumps or compressors which have two or more pistons which work against each other preferably with a common combustion space or corresponding in a stationary cylinder, and where the power is ... | 06/27/2000 |
| 5713314 | Dual piston internal combustion engine An internal combustion engine (1) comprising at least two cylinders (4,8) meeting to form a combustion space (12) therebetween, a first piston (3) adapted to reciprocate within the first cylinder (4) and a second piston (7) adapted to reciprocate within t... | 02/03/1998 |
| 5517953 | Stepped piston axial engine A highly pressurized internal combustion engine, wherein arrangements to balance the intake flow of air that passes from the turbochargers to a windchest, through spring valves to compressor cylinders, that force the charge into a pressure chamber to supp... | 05/21/1996 |
| 5477818 | Internal combustion engine An internal combustion engine presenting a number of cylinders, each defined by a respective axially symmetrical cavity formed in the engine block, and each defining, together with a piston sliding axially inside the cylinder and a head connected to the b... | 12/26/1995 |
| 5448979 | Dual compression and dual expansion internal combustion engine and method therefor An apparatus and method is provided for a dual compression and dual expansion internal combustion engine (8) that is compact, efficient, and has low combustion noise and emissions. The subject engine (8) includes a low pressure piston assembly (56) recipr... | 09/12/1995 |
| 5363813 | Dual rocker shaft internal combustion diesel engine This invention relates to a novel improvement in diesel engines. A two cycle direct injection internal combustion diesel engine comprising four pistons utilizing two common cylinders, dual rocker shaft (internally including shaft within a shaft), pluralit... | 11/15/1994 |
| 5228415 | Engines featuring modified dwell Novel reciprocating engines which feature conversion units each formed of an expansion cylinder, a compression cylinder and a passageway connecting the two. Pistons in the cylinders are preferably connected via a four-bar or other linkage to the crank so ... | 07/20/1993 |
| 5203287 | Oscillating piston engine An internal combustion engine has a rotating annular cylinder containing a plurality of mutually oscillating pairs of pistons, one of each pair being rigidly fixed to a first axially-oscillating tube, the other of each pair being fixed to a second such tu... | 04/20/1993 |
| 5109810 | Two cycle internal combustion hydrocycle engine A two-cycle internal combustion engine includes two opposed pistons reciprocatable within a cylinder, between which an air-fuel mixture is injected and ignited. One of the pistons, a compression piston, is connected to a rotatable flywheel for storing ene... | 05/05/1992 |
| 5083530 | Internal combustion engine having opposed pistons An opposed piston engine includes at least one pair of pistons synchronously reciprocatingly mounted in a hollow cylinder. At least one projection is formed on the face of one piston, while a corresponding recess is formed on the face of the other piston,... | 01/28/1992 |
| 5056471 | Internal combustion engine with two-stage exhaust An internal combustion engine is provided having pairs of separately designated combustion and exhaust cylinders for implementing a two-stage exhaust system which derives work from the combustion gases of the combustion cylinders. The piston within each e... | 10/15/1991 |
| 5025756 | Internal combustion engine An internal combustion engine having a set of annular 360 degree cylinders each containing two sets of double-headed pistons. The piston sets reciprocate approximately 45 degrees within said cylinder between two combustion ports located 180 degrees apart.... | 06/25/1991 |
| 5012769 | Energy transfer unit having at least three adjacent piston members An energy transfer unit comprises an upper wall, a lower wall spaced apart from the upper wall and being substantially parallel thereto, and at least three piston members pivotably mounted between the upper wall and the lower wall forming a chamber thereb... | 05/07/1991 |
