| WO2001061151A1 | 2001-08-23 |
| DE9401804U1 | 1994-04-07 | |||
| DE3332707A1 | 1985-03-28 | |||
| US3175359A | 1965-03-30 | |||
| EP0750117A1 | 1996-12-27 | |||
| GB2030227A | 1980-04-02 |
| 1. | Motorbase where screws, leftand right threaded in turn, interact with each other, for sealing beetween themselves and against the walls of the motor casing, characterized in that the diameters of the threadtopps and threadbottoms may be constant and may be altered proportionally against each other in a conical pitch to accomplish first fase inlet (1), (2), and second fase compression (2), (3), (4) and third fase expansion (4), (5), (6), (7), and that the threadpitch increases/is larger in the third fase the expansionfase (5), (6), (7) to accomplish a larger volume of expansion than volume of inlet. |
| 2. | The motorbase in accordance with claim no. 1, is characterized by that the pitch between the screws in the diameter of the threadbottoms and the threadtops in the expansionfase and the compressionfase (11), (12), together with the threadpitch determine how many threads the fases take. |
| 3. | The motorbase in accordance with claim no. 1, is characterized in that the threadwidth may be equal or different on the interacting screws (13), (14). |
| 4. | The motorbase in accordance with claim no. 1, is characterized by that the screws are connected by cogwheels or similar, thus they under rotation not at any point will touch each other (8). |
The ends of the motor casing is constructed with openings for inlet and outlet (10), (9).
The first motorfase is the inletfase of the motorbase. The extent of this fase is one thread and is repeted for each rotation of the screws. It goes from (1) to (2). In this fase, the diameter of the threadtopps and threadbottoms is constant. The second fase is the fase of compression in the motorbase. The extent of this fase is one or several treads. In my example the extent is two threads from (2) to (4). From (2) to (3) the diameter of the threadtopps descends, while the diameter of the threadbottoms ascends. From (3) to (4) the diameter of the threadtops and threadbottoms is constant. The third fase is the fase of expansion in the motorbase. The extent of this fase can be one or several threads. In my example from (4) to (7). From (4) to (5) the diameter of the threadtops and the threadbottoms is constant. From (5) to (6) the threadpitch increases, and the diameter of the threadtops ascends and the diameter of the threadbottom descends. From (6) to (7) the diameter of the threadtops and threadbottom is constant while the threadpitch may continue to increase.
The combination of a constant and altered threadpitch and the proportional alteration of the diameter, of the threadtops and the threadbottoms, leades to the threadvolumes compression/expansion whilst they wander over the changes during revolution. These are the factors which give the motorbase its function. In this way, one inlet cycle may be accomplished by each rotation of the screws, while one expansion cycle take several rotations, in my example approximately 3,5 rotations. This gives the screws 3, 5 expansions and one inlet for each rotation. Through this construction of the motorbase, the total volume of expansion will be larger than the total volume of inlet. One acchieves one inlet for each rotation and several expansions for each rotation.
Three patents where parts of this technology is known: In EP 0 842 721 Al, a method for production of stright rotors are described, where the rotors are formed by coned screws.
In FI 104440 B a screw pump where the screW s diameters are altered along the longitudinal axis is described.
In DK 146861 B a screwrotormachine with two paralell cooperating spindles is described.
The direction of thread on each of the spindles is altered at the center of the longitudinal axis, and is oposite on each of the spindles. Each spindle consists of two screws with increasing/decreasing thread pitch and thread diameter. Depending on the direction of turn, the machine will have an either compressing or expanding function.
Mainly, my invention deverses from these patents by it beeing constructed as a combustion engine. It has, during function revolution, the three fases inlet, compresion and expansion.
Further, the invention alters between a constant thread pitch and an increasing thread pitch.