Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 7270108 | Opposed piston, homogeneous charge pilot ignition engine An engine of the opposed piston, two-stroke, compression ignition type includes provision for injection of a main charge of liquid fuel into the bore of a cylinder between opposed pistons early in a compression stroke to permit the fuel to evaporate and mix with air... | 09/18/2007 |
| 7047916 | Two-stroke internal combustion engine with free opposed pistons A two-stroke internal combustion engine comprises a first cylinder and a second cylinder arranged on a common axis. A first piston pair comprises a first piston and a second piston located in the first cylinder and defining a first combustion chamber. The first pist... | 05/23/2006 |
| 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 |
| 6959672 | Fuel injection for a free piston engine A free piston engine is configured with a pair of opposed engine cylinders located on opposite sides of a fluid pumping assembly. An inner piston assembly includes a pair of inner pistons, one each operatively located in a respective one of the engine cylinders, wit... | 11/01/2005 |
| 6957632 | Air charging system for an opposed piston opposed cylinder free piston engine A free piston engine is configured with a pair of opposed engine cylinders located on opposite sides of a fluid pumping assembly. An inner piston assembly includes a pair of inner pistons, one each operatively located in a respective one of the engine cylinders, wit... | 10/25/2005 |
| 6328002 | Misfire tolerant combustion-powered actuation The present invention provides a combustion-powered actuator that is suitable for intermittent actuation, that is suitable for use with atmospheric pressure carburetion, and that requires little electrical energy input. The present invention uses energy f... | 12/11/2001 |
| 6206656 | Method of operating a free piston internal combustion engine with high pressure hydraulic fluid upon misfire or initial start-up A method of operating a free piston engine of the present invention, includes a housing with a combustion cylinder and a second cylinder. A piston includes a piston head reciprocally disposed within the combustion cylinder, a second head reciprocally disp... | 03/27/2001 |
| 6170442 | Free piston internal combustion engine A free piston internal combustion engine having improved valve timing. A pair of oppositely disposed combustion chamber passageways extending between the combustion chamber and the earth's atmosphere, each have a combustion chamber valve for controlling t... | 01/09/2001 |
| 6135068 | Method for absorbing the vibration of a free-piston engine and vibration-absorbed free-piston engine The invention relates to a method for absorbing the vibration of a five-piston engine and to a vibration-absorbed five-piston engine. At least two separate piston units are synchronized to operate in a counter action such that a certain position of one pi... | 10/24/2000 |
| 5775273 | Free piston internal combustion engine A free piston internal combustion engine having improved valve timing. A pair of oppositely disposed combustion chamber passageways extending between the combustion chamber and the earth's atmosphere, each have a combustion chamber valve for controlling t... | 07/07/1998 |
| 4896632 | Unsymmetrical free piston engine A compact free piston engine of the unsymmetrical type including a structure with a cylinder detachably supported therein, said cylinder having a pair of pistons with a combustion chamber therebetween and each piston having a rod extending through the adj... | 01/30/1990 |
| 4662177 | Double free-piston external combustion engine A free piston combustion chamber coupled to air compression and gas expansion chambers are combined with a rotary motor. The rotary motor shaft drives the air compressor, receives power from the expanding gases in the expansion chamber and provides residu... | 05/05/1987 |
| 4344288 | Internal combustion engine An internal combustion engine in which a rotor or turbine is driven by the exhaust gases of a pair of interconnected double-acting pistons. The double-acting pistons are interconnected by a pinion gear and are internally constructed to have an inner pisto... | 08/17/1982 |
| 4244331 | Free piston gas generator assemblies A free piston gas generator assembly in which the scavenging efficiency of the power cylinder is increased, by interconnecting in series a plurality of three or more identical motor-compressor cylinders, by means of a piping system, into one engine assemb... | 01/13/1981 |
| 4085711 | Free piston engine with opposed cylinders A free piston engine having a pair of opposed power cylinders and pistons on a common longitudinal axis with an energy absorbing device, such as a compressor piston, being directly connected to one of the power pistons and indirectly connected to the othe... | 04/25/1978 |
