Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 6904883 | Modular internal combustion engines A line of small internal combustion engines, including twin cylinder engines and single cylinder engines. The engines each include a crankcase, and one or more cylinder members attached to the crankcase, the cylinder members being separate components from the crankc... | 06/14/2005 |
| 5452702 | Side-valve type internal combustion engine In a side-valve internal combustion engine, a combustion chamber in a cylinder head is defined into a substantially triangular pyramid shape having a triangular opened edge. A third angle portion of the opened edge formed by a first slant having a relativ... | 09/26/1995 |
| 5406912 | Internal combustion engine An internal combustion engine has at least one set of first and second cylinders (12,14), the first cylinder (12) having a larger swept volume than the second cylinder (14), and respective first and second pistons (16,18) movable in the cylinders. The pis... | 04/18/1995 |
| 5205246 | Economy engine The invention presents new and useful improvements in the mechanical design of control elements used in the sequencing of the exhaust and intake process cycles of the 4-stroke reciprocating piston engine. The exhaust and induction circuits pass through th... | 04/27/1993 |
| 5010860 | Internal combustion engine with twin combustion chambers An internal-combustion engine includes two combustion spaces for each cylinder. Each combustion space is separated from the cylinder space and has a valve to open and close a passage through which communication is established between the combustion space ... | 04/30/1991 |
| 5007384 | L-head two stroke engines An L-head two stroke engine comprises two pistons mounted for reciprocable movement in first and second cylinders respectively. The cranks of the two pistons are drivably connected such that the pistons are in phase. A fuel/air supply is provided for one ... | 04/16/1991 |
| 4977863 | Air-cooled internal combustion engine having canted combustion chamber and integral crossover intake manifold An air-cooled internal combustion engine, a crankshaft and a camshaft rotatably journalled in the crankcase parallel to one another, and a cast intake valve chamber and cast exhaust valve chamber each cast integrally with the cylinder and communicating wi... | 12/18/1990 |
| 4246882 | Combustion chamber for side-valve type internal-combustion engine A side-valve type internal-combustion engine has a cylinder head formed with a recess or recesses each of which forms a combustion chamber with the associated cylinder and which is large enough to permit the alternate flow of suction or exhaust gas betwee... | 01/27/1981 |
| 4125105 | Four cycle internal combustion engine An externally ignited four cycle internal combustion engine equipped with an inlet valve and an outlet valve, both valves being positioned on one side of the cylinder. A swirl (or vortex) chamber is provided within the cylinder head, the height of the swi... | 11/14/1978 |
| 4111177 | Internal combustion engine A stratified charge, internal combustion engine having a cylinder, a piston reciprocally disposed within the cylinder, a head secured over the cylinder, a chamber in the head above the cylinder, an air pocket adjacent the chamber and extending radially be... | 09/05/1978 |
| 4103664 | Combustion chamber for compact engine of the side valve type for universal use having contactless ignition system The spark gap portion of an ignition plug in a combustion chamber is adapted to be opposed to a bundle of streams of the air-fuel mixture withdrawn from an intake valve and is positioned on a line extending from the center of the cylinder to a midpoint be... | 08/01/1978 |
