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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 6948473 | 4-cycle, rotary, electromagnetic, internal combustion engines Four-cycle rotary engines, with an even number of hinged-hub impeller vanes, utilize dependently rotating, joined, hinged-hub impellers, with interdigitated, alternating hub sections, on a shared, power output shaft, and electromagnetic fields, and timing of impelle... | 09/27/2005 |
| 6405703 | Internal combustion engine A rotary internal combustion engine includes a housing within which is mounted for rotation at least one rotor. The rotor includes at least one flow conduit. The flow conduit defines a compression region having an inlet proximate to the rotation axis of t... | 06/18/2002 |
| 6257195 | Internal combustion engine with substantially continuous fuel feed and power output The internal combustion engine allows charging with an air/fuel mixture into the combustion chamber while the combustion chamber is under combustion pressure and outputs power virtually continuously at the same time, i.e., the novel engine has an almost c... | 07/10/2001 |
| 6189502 | Grooved double combustion chamber rotary engine A grooved double combustion chamber rotary engine includes a rotary compression unit, a rotary gas motor unit, and a combustion chamber, the rotary compression unit being connected to the respective rotary gas motor unit and the combustion chamber to cons... | 02/20/2001 |
| 5755197 | Rotary engine A rotary internal combustion engine is disclosed having a housing with a compression chamber and an expansion chamber which can be separate chambers with separate rotors located therein or a combined chamber with a single double-lobed rotor located therei... | 05/26/1998 |
| 5605124 | Rotary screw internal combustion engine A rotary internal combustion engine including a rotary screw compressor for receiving and compressing a mixture of air and fuel, a rotary positive displacement pump for receiving the compressed air and fuel mixture from the rotary screw compressor and pum... | 02/25/1997 |
| 5429083 | Rotary internal combustion twin engine A rotary internal combustion twin engine includes matching pairs of multilobed interengaging compression rotors compressing gas and air mixtures into compression chambers defined by concavities of transfer rotors. With a 180 degree rotation of transfer ro... | 07/04/1995 |
| 5036669 | Apparatus and method for controlling the air/fuel ratio of an internal combustion engine In the subject invention an electronic control unit is used to control the air/fuel ratio in an engine combustion chamber in response to sensed engine parameters. More particularly, a magneto interface produces an ignition signal which is delivered to a s... | 08/06/1991 |
| 4909208 | Rotary internal combustion motor An internal combustion motor consists of three rotary units, namely a pump (A) with blades, a bladed motor (C) and a combustion space (B) which is a cylindrical chamber (7) including a rotor (8) performing a rotary motion in a sealed manner, having at lea... | 03/20/1990 |
| 4403581 | Rotary vane internal combustion engine A rotary-vane internal combustion engine comprising, in combination, a rotary compressor for forming and igniting a combustible fluid mixture, a rotary power unit, and an expansion chamber that is connected both to the compressor for receiving the ignited... | 09/13/1983 |
| 4393828 | Rotary engine This invention relates to a simplified design for a rotary internal combustion engine. The engine consists of rollers, acting as pistons and cranks, and specially designed vanes or seals which divide each roller housing into two working chambers. The vane... | 07/19/1983 |
| 4170978 | Rotary engine A rotary member is provided that includes a housing having a pair of rotors mounted therein, and wherein there is provided a shaft having a channel or passageway therein that selectively communicates with the chambers in which the rotors turn. The rotary ... | 10/16/1979 |
| 4008693 | Rotary engine A rotary combustion engine having intermeshing rotors, and provided with external transfer passageways which connect the rotor chambers and function as combustion chambers for air compressed by the intermeshing of the rotors. The engine may also be provid... | 02/22/1977 |
| 4007715 | Rotary engines, compressors and vacuum pumps A rotary machine useful as a rotary compressor or engine having a cylindrical compressor rotor with a lobe outstanding from its cylindrical rolling surface geared to another cylindrical rotor with a recess, in its cylindrical rolling surface, the rotors b... | 02/15/1977 |
| 3948225 | Rotary internal combustion engine with parallel coextensive rotors This engine has coextensive rotors on parallel axes in coextensive cavities having parallel axes. In each cavity there is an inlet and compression chamber on one side of the rotor in said cavity and an explosion and exhaust chamber on the other side of sa... | 04/06/1976 |
