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A rotary engine and a hydraulic motor including non-rotary outer and inner casings; a power shaft with an eccentric part; a driving eccentric ring between the outer and inner casings and mounted on the eccentric part; a combustion or pressure chamber between the eccentric ring and the inner casing s

A rotary engine and a hydraulic motor including non-rotary outer and inner casings; a power shaft with an eccentric part; a driving eccentric ring between the outer and inner casings and mounted on the eccentric part; a combustion or pressure chamber between the eccentric ring and the inner casing such that the eccentric ring drives the power shaft by substantially non-rotating eccentric movement; dividers for dividing the combustion chamber into at least two parts, the dividers extend through the inner casing and are in contact with an inner surface of the driving eccentric ring; and an eccentric device (or control) for driving the dividers back and forth with respect to the inner casing. The eccentricity of the eccentric device corresponds with the eccentricity of the eccentric part of the power shaft. The eccentric device has a guide groove which implements an eccentric path and to which the dividers are connected.

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1. A rotary combustion engine, comprising a non-rotary outer casing,a non-rotary inner casing,a power shaft provided with an eccentric part,a driving eccentric ring provided between the outer casing and the inner casing and mounted in bearings on the eccentric part of the power shaft,a combustion ch

1. A rotary combustion engine, comprising a non-rotary outer casing,a non-rotary inner casing,a power shaft provided with an eccentric part,a driving eccentric ring provided between the outer casing and the inner casing and mounted in bearings on the eccentric part of the power shaft,a combustion chamber arrangement that burns a mixture of fuel and air supplied into the engine between the driving eccentric ring and the inner casing such that the driving eccentric ring drives the power shaft by means of substantially non-rotating eccentric movement,divider members that divide the combustion chamber arrangement into at least two parts of equal size, whereby the divider members extend through the inner casing and are in close contact with an inner surface of the driving eccentric ring,an eccentric device or control that drives the divider members back and forth with respect to the inner casing, whereby the eccentricity of the eccentric device or control corresponds with the eccentricity of the eccentric part of the power shaft, wherein the eccentric device or control comprises at least one guide disc having at least one guide groove which implements an eccentric path and to which the divider members are connected;the eccentric path implemented by the guide groove is elliptical; andthe guide groove is formed in a side surface of the at least one guide disc mounted fixedly on the power shaft. 2. An engine as claimed in claim 1, wherein the number of guide discs is one, and the guide disc is located next to the eccentric part. 3. An engine as claimed in claim 1, wherein the number of guide discs is two, one on each side of the divider members. 4. An engine as claimed in claim 1, wherein the guide groove is formed on a side surface of the eccentric part. 5. An engine as claimed in claim 1, wherein each divider member is connected to a respective guide groove via at least one bearing fastened to the divider member. 6. An engine as claimed in claim 5, wherein a first and a second bearing successively located in the longitudinal direction of the power shaft are connected to each divider member, the first bearing being arranged to be in contact with an outer circumferential surface of the guide groove and the second bearing arranged to be in contact with an inner circumferential surface of the guide groove. 7. An engine as claimed in claim 1, wherein each divider member is connected to a respective guide groove via at least one slide member fastened to the divider member. 8. An engine as claimed in claim 1, wherein the focal points of the elliptical eccentric path are located on an axis which is perpendicular to a line passing through the central axis of the power shaft and a centre of eccentricity of the driving eccentric ring and the guide groove. 9. A hydraulic motor, comprising a non-rotary outer casing,a non-rotary inner casing,a power shaft provided with an eccentric part,a driving eccentric ring provided between the outer casing and the inner casing and mounted in bearings on the eccentric part of the power shaft,a pressure chamber arrangement between the driving eccentric ring and the inner casing that conveys hydraulic fluid thereto and therefrom such that the driving eccentric ring drives the power shaft by means of substantially non-rotating eccentric movement,divider members that divide the pressure chamber arrangement into at least two parts of equal size, whereby the divider members extend through the inner casing and are in close contact with an inner surface of the driving eccentric ring,an eccentric device or control that drives the divider members back and forth with respect to the inner casing, whereby an eccentricity of the eccentric device or control corresponds with an eccentricity of the eccentric part of the power shaft, wherein the eccentric device or control comprises at least one guide disc having at least one guide groove which implements an eccentric path and to which the divider members are connected;the eccentric path implemented by the guide groove is elliptical; andthe guide groove is formed in a side surface of the at least one guide disc mounted fixedly on the power shaft. 10. A motor as claimed in claim 9, wherein the number of guide discs is one, and the one guide disc is located next to the eccentric part. 11. A motor as claimed in claim 9, wherein the number of guide discs is two, one on each side of the divider members. 12. A motor as claimed in claim 9, wherein the guide groove is formed on a side surface of the eccentric part. 13. A motor as claimed in claim 9, wherein each divider member is connected to a respective guide groove via at least one bearing fastened to the divider member. 14. A motor as claimed in claim 13, wherein a first and a second bearing successively located in the longitudinal direction of the power shaft are connected to each divider member, the first bearing being arranged to be in contact with an outer circumferential surface of the guide groove and the second bearing being arranged to be in contact with an inner circumferential surface of the guide groove. 15. A motor as claimed in claim 9, wherein each divider member is connected to a respective guide groove via at least one slide member fastened to the divider member. 16. A motor as claimed in claim 9, wherein the focal points of the elliptical eccentric path are located on an axis which is perpendicular to a line passing through the central axis of the power shaft and a centre of eccentricity of the driving eccentric ring and the guide groove.