Bizarre Patents
Pizza Pie With Concentric Rings of Crust
A pizza mold for forming a plurality of concentric raised ridges of dough (i.e., crust) on the surface of a pizza pie.
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| Number | Title | Issue Date |
| 7905221 | Internal combustion engine An engine block is disclosed in one embodiment having a cylinder shape bore, which forms the outside wall surface of a cylindrical air chamber. Radially outwards from the cylindrical air chamber there is an annular shape combustion chamber, which has a circular inne... | 03/15/2011 |
| 7634988 | Internal combustion engine An engine block is disclosed in one embodiment having a cylinder shape bore, which forms the outside wall surface of a cylindrical air chamber. Radially outwards from the cylindrical air chamber there is an annular shape combustion chamber, which has a circular inne... | 12/22/2009 |
| 7370627 | Optimized low emission two-stroke internal combustion diesel engine An optimized two-stroke internal combustion diesel engine, suitable for locomotive applications, has been developed to meet the EPA locomotive Tier 2 emission standards. To achieve a low emission target below the EPA Tier 2 standards for NOx (5.5 g/bhp-hr... | 05/13/2008 |
| 6955165 | Three-reentrancy combustion chamber A combustion chamber assembly for use in a piston of a diesel engine includes a combustion chamber being defined intersecting a crown of the piston, the combustion chamber being substantially defined by three surfaces, a post being in part a spherical surface, a bot... | 10/18/2005 |
| 6945210 | Combustion chamber with one concave surface and three convex surfaces A combustion chamber assembly for use in a piston of a diesel engine includes a combustion chamber defined intersecting a crown of the piston, the combustion chamber being defined by a concave surface in cooperation with three convex surfaces, adjacent surfaces havi... | 09/20/2005 |
| 6912988 | Multiple-front combustion chamber system with a fuel/air management system A combustion chamber of a positive-displacement spark-ignited internal combustion engine is divided into a main combustion chamber and a pre-combustion chamber having proximal and distal ends. The proximal end is connected to the main combustion chamber and a spark-... | 07/05/2005 |
| 6708666 | Multi-zone combustion chamber for combustion rate shaping and emissions control in premixed-charge combustion engines An apparatus and method for improving efficiency of combustion engines. At least two combustion chambers are provided by contouring the surface of a piston or a cylinder head or a combination thereof. Such a contoured piston or cylinder head controls the peak temper... | 03/23/2004 |
| 5048472 | Two stroke cycle internal combustion engine Two stroke cycle internal combustion engine comprising; a ported cylinder, a cylinder head with an opening, a piston with an opening, a ported sleeve which is axially displaced inside the cylinder, extending through the cylinder head opening and the pisto... | 09/17/1991 |
| 4974556 | Internal combustion engine An internal combustion engine includes a pair of opposed piston assemblies that reciprocate within a single combustion chamber in an engine block. Each piston assembly includes an annular piston head that is received concentrically around a driveshaft whi... | 12/04/1990 |
| 4872433 | Combustion chamber configurations for two cycle engines Improved combustion chamber configurations for two-cycle engines with high pressure fuel injected systems having reciprocal pistons, cylinders with multiple injectors for each cylinder and a cylinder head liner with a chamber having a discoidal configurat... | 10/10/1989 |
| 4606303 | Reciprocating piston internal combustion engine In a reciprocating piston internal combustion engine, an upwardly arcuately shaped combustion space is formed in the cylinder head, which contains suspended valves arranged V-shaped. The valves are moved as close as possible to the combustion space bounda... | 08/19/1986 |
| 4170966 | Mixture-compressing internal combustion engine, especially four-cycle engine A mixture-compressing internal combustion engine with a combustion space arranged either in the piston or in the cylinder head and with an ignition source located in the cylinder head; the main volume of the combustion space is thereby delimited by circul... | 10/16/1979 |
