| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 123000000 | DOUBLE-ACTING | 8 |
| 123061000 | Two-cycle | 5 |
| 20100282224 | Combustion Engine with Heat Recovery System - An internal combustion engine has at least two double action internal combustion cylinders and a separate double action compressor cylinder. Each double action internal combustion cylinder has a multi-point ignition system for each combustion chamber for causing multiple flame fronts to cause the fuel/air mixture to burn more quickly. Furthermore, the engine has a closed heat recovery system that takes heat from the exhaust of the internal combustion cylinder system and delivers power to a crankshaft. Accordingly, the internal combustion engine has increased efficiency by minimizing friction and extracting energy from multiple sources. | 11-11-2010 |
| 20120186567 | Environmental friendly two stroke engine - This is mainly an one cylinder environmental friendly two stroke engine with a lubrication and a gas control mechanism similar to a four stroke engine. | 07-26-2012 |
| 20140345581 | INTERNAL COMBUSTION ENGINE - An internal combustion engine is disclosed. The internal combustion engine includes a head, a first and second cylinders, a first and second doubled-end pistons, a wrist pin, a connecting rod, and a crankcase. The first and second doubled-end pistons are disposed within the first and second cylinder, respectively. The wrist pin and the connecting rod are connected to the first and second doubled-end pistons. The crankcase contains a crankshaft connected to the connecting rod. The head, which is coupled to the first and second cylinders, includes a first and second spark plugs for associating with first ends of the first and second doubled-end pistons, respectively. The crankcase includes a third and fourth spark plugs for associating with second ends of the first and second doubled-end pistons, respectively. | 11-27-2014 |
| 20150128920 | Lubricating Configuration for Maintaining Wristpin Oil Pressure in a Two-Stroke Cycle, Opposed-Piston Engine - A lubricating configuration in a two-stroke cycle, opposed-piston engine for a piston wristpin minimizes losses in oil pressure at the wristpin as the piston approaches bottom center and reduces the required oil supply pressure to the engine. The wristpin is constructed to absorb and store oil pressure energy when oil pressure at the wristpin is high, and to release that stored energy to pressurize the oil at the wristpin when connecting rod oil pressure is low. | 05-14-2015 |
| 123062000 | Combined pump and motor cylinder | 1 |
| 20110146601 | Self-Aspirated Reciprocating Internal Combustion Engine - Disclosed are crankshaft, single-plate cam and beam mechanisms that provide significant improvements in performance for 2- & 4-stroke engines, compressors and pumps. These cost effective mechanisms include linkages with the new and improved use of pivoting arms that operate with a variety of cylinder arrangements. One embodiment of the crankshaft mechanism has its crankpin roller positioned within a novel yoke-arm. The cam mechanism uses a pair of centrally positioned parallel links that are connected to roller cam followers and single or diametrically-opposed pistons. A pair of laterally extending follower arms connects to the ends of the links to provide support and alignment for the piston rods. Between the reciprocating links, cam followers and follower arms is a rotating odd-lobe plate cam. A beam mechanism uses opposite-direction extending balancing beams that are connected to links, cam followers and piston rods. | 06-23-2011 |
| 123063000 | Four-cycle | 3 |
| 20090007861 | Double Action Piston Assembly - The double action piston assembly is for an internal combustion engine and has a combustion chamber that has a double action piston connected to one end of a central power rod disposed within the combustion chamber. A first intake air port and a first exhaust port are located in the up side of the combustion chamber. A compression chamber is connected to the combustion chamber. A central power rod passes through the combustion chamber into the compression chamber and out the compression chamber. A fuel mixture is fed into the combustion chamber and ignition means adjacent to combustion chamber to ignite the fuel mixture. At the end of each stroke, the compression exhaust valves are opened and the intake ports and the exhaust ports are open to permit air from the compression chamber to pass through the conduits into the combustion chamber for full scavenging of the combustion chamber. | 01-08-2009 |
| 20090183699 | Compression Ignition Engines and Methods - Compression ignition engines and methods of the type wherein the engines operate with one cylinder used as a compression cylinder and a second cylinder used as a combustion cylinder. The engines have all cylinders configured so as to be able to operate as a compression cylinder or a combustion cylinder. In the method of operation, a cylinder may switch its operation between being a compression cylinder and then operate a combustion cylinder. Switching the operation between compression and combustion operation results in an even temperature distribution within the engine, and eliminates the need for special cooling requirements, facilitating retrofit of existing engines. Also use of an air storage tank allows all cylinders to operate as combustion cylinders for short bursts of power. Various other features are disclosed. | 07-23-2009 |
| 20100043735 | SUPERCHARGED INTERNAL COMBUSTION ENGINE INCLUDING A PRESSURIZED FLUID OUTLET - A supercharged internal combustion engine including a pressurized fluid outlet, the engine comprising a two-ended piston, with one end received in a combustion chamber, and another end received in a hydraulic chamber. The piston further including a portion intermediate the two ends and received within an air chamber, and the air chamber has an air outlet communicating with a combustion air inlet to the combustion chamber. | 02-25-2010 |
