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| Number | Title | Issue Date |
| 7194989 | Energy efficient clean burning two-stroke internal combustion engine A precision cast engine has a piston unit and a rotor unit to translate linear thrust from the piston unit into rotary power. Each piston rod is attached to a thrust absorber carriage running on precision bearings to eliminate piston drag on the cylinder walls. One ... | 03/27/2007 |
| 6520128 | Piston valve for two-stroke engine A two-stroke engine has a piston operatively connected to a crankshaft for reciprocating motion within a cylinder. An annular piston valve is mounted for slidable motion with respect to a centrally located inner body of the piston to control a flow of cyc... | 02/18/2003 |
| 6405691 | Piston valve for two-stroke engine A two-stroke engine has a piston operatively connected to a crankshaft for reciprocating motion within a cylinder. An annular piston valve is mounted for slidable motion with respect to a centrally located inner body of the piston to control a flow of cyc... | 06/18/2002 |
| 5809947 | Piston valve A valve is provided for a piston of a two stroke engine wherein the piston has a sidewall and top and bottom surfaces with the top surface having a first opening therein and a second opening extending between the top and bottom surfaces for receiving the ... | 09/22/1998 |
| 5201286 | Two-stroke cycle internal combustion engine A two-stroke cycle internal combustion engine including a crankshaft, a connecting rod pivotally connected to the crankshaft, a fuel induction system and spark plug or the like. The cylinder has a closed head end and a closed rearward end and a piston wit... | 04/13/1993 |
| 5156118 | Process and device for self super-charging a two stroke engine Process and device for supplying air to the cylinder of a two-stroke internal combustion engine, with at least one set of two cylinders arranged at 180 degrees, supercharged by a post-filling effect. Said device is characterized in that it comprises a vol... | 10/20/1992 |
| 5060602 | Device for controlling or monitoring the start of introduction under pressure, of a fuel-air mixture following scavenging of an engine cylinder by air A device (4, 5) for introducing, under pressure, a fuel-air mixture into a first cylinder of an internal combustion engine, with the engine comprising at least one other cylinder having a pump crankcase. A connecting passageway (9) is provided between the... | 10/29/1991 |
| 5029559 | Opposed piston engine having fuel inlet through rod controlled piston port An opposed piston two cycle internal combustion engine. The movement of the opposed pistons is transmitted to two cranks, the two cranks are interlocked together by gears. The gears maintain synchronized movement of the cranks and further act as an air pu... | 07/09/1991 |
| 4834033 | Apparatus and method for a balanced internal combustion engine coupled to a drive shaft An internal combustion engine is described in which the piston movement is parallel to the drive shaft. The engine cylinders are arranged in opposed pairs and the piston rods directly coupled so that the power stroke in one cylinder can assist with the co... | 05/30/1989 |
| 4366784 | Crankless cam driven piston engine A lightweight crankless piston engine utilizes cam action to produce two piston strokes for one revolution of the engine output shaft, which shaft does not pierce the piston or the combustion chamber. Ease of assembly is enabled. One section of the cam is... | 01/04/1983 |
| 4294201 | Internal combustion engines A two-stoke cycle combustion-engine with crank-chamber compression is described, free of charging transfer passages external to the cylinder, with pumping-displacement exceeding working-displacement for responsive intake and thorough scavenging of spent-g... | 10/13/1981 |
| 4250844 | Two-cycle engine and piston An improved two-cycle internal combustion engine with a novel intake, exhaust and piston arrangement in which a fresh charge for combustion component is advantageously transferred through the piston and all valves in the engine operate in response to chan... | 02/17/1981 |
| 4217865 | Internal combustion engine An internal combustion engine having a piston assembly such that gaseous flow into a cylinder is through the piston assembly and wherein all gaseous flow in a cylinder is in a single direction. The piston assembly includes inner and outer piston members w... | 08/19/1980 |
| 4169434 | Internal combustion engine with stepped piston supercharger A reciprocating piston four cycle internal combustion engine utilizes a stepped piston the stepped portion of which, working in an enlarged bore in the block, serves as a compressor to provide a supercharged fuel-air mixture to the combustion chamber. The... | 10/02/1979 |
| 4156410 | Internal combustion reciprocating engine An internal combustion engine having a housing defining a pair of axially aligned and opposing cylinders with a lubricant chamber therebetween, a stationary piston in the housing extending through the lubricant chamber and having opposite ends disposed wi... | 05/29/1979 |
| 4128083 | Gas cushioned free piston type engine A gas cushioned free piston type engine comprises two oppositely arranged combustion cylinders and a pair of pistons reciprocably mounted therein, which are rigidly connected to each other by a common piston rod. The engine includes further a pump cylinde... | 12/05/1978 |
| 4112882 | Two-cycle engine and piston An improved two-cycle internal combustion engine with a novel intake, exhaust and piston arrangement in which a fresh charge for combustion is advantageously transferred through the piston and all valves in the engine operate in response to changes in dyn... | 09/12/1978 |
| 4037570 | Stratified charge internal combustion engine A four stroke cycle internal combustion engine is disclosed with means to provide auxillary pumping of air directly into the cylinder. The piston head is provided with a sliding valve which is self-acting for injecting air into the cylinder during the int... | 07/26/1977 |
