The invention relates to a beverage preparation device comprising a cylindrical chamber with a jacket provided with a filling opening for receiving a powder-like or granular substance and an ejection opening for ejecting the substance, a first and a second compression element, positioned perpendicul
The invention relates to a beverage preparation device comprising a cylindrical chamber with a jacket provided with a filling opening for receiving a powder-like or granular substance and an ejection opening for ejecting the substance, a first and a second compression element, positioned perpendicularly with respect to a longitudinal axis of the chamber, a displacement member for relative displacement of the first compression element with respect to the jacket between a filling position, a compression position and an ejection position, wherein the compression elements in the filling position delimit a filling volume and the compression elements in the compression position delimit a preparation volume positioned along a longitudinal axis and at a distance from the filling volume, wherein the first compression element engages the inner wall of the jacket in a fluid-tight manner and a fluid supply channel and a fluid discharge channel that in the compression position is in fluid-communication with the preparation volume.
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1. Beverage preparation device (1) comprising a jacket (23) defining a cylindrical chamber (9) provided with a filling opening (26) in said jacket (23) for receiving a powder-like or granular substance and at a first transverse side of said cylindrical chamber (9) an ejection opening (36) for ejecti
1. Beverage preparation device (1) comprising a jacket (23) defining a cylindrical chamber (9) provided with a filling opening (26) in said jacket (23) for receiving a powder-like or granular substance and at a first transverse side of said cylindrical chamber (9) an ejection opening (36) for ejecting the substance,a first compression element (22) and a second compression element (23b, 32), both positioned perpendicularly with respect to a longitudinal axis (37) of the chamber (9), the second compression element (23b, 32) being fixedly connected to the jacket (23) and forming a transverse wall of the chamber (9) that is stationary relative to the chamber (9) and that is situated at a second transverse side of the chamber (9), opposite the first transverse side,a displacement member (2, 4, 5, 13) adapted for relative axial displacement of the first compression element (22) with respect to the jacket (23) and said second compression element which is fixedly connected to the jacket and stationary relative to the chamber defined by said jacket, between a filling position, a compression position and an ejection position, wherein the compression elements (22; 23b, 32) in the filling position delimit a filling volume with said first compression element closing off said ejection opening while not closing off said filling opening, wherein the compression elements (22; 23b, 32) in the compression position delimit a preparation volume positioned along the longitudinal axis (27) at a distance from the filling volume, wherein in said compression position the first compression element (22) engages an inner wall (31) of the jacket (23) in a fluid-tight manner, anda fluid supply channel (14) and a fluid discharge channel (3) that in the compression position are in fluid-communication with the preparation volume,wherein an ejection member (10) is displaceably arranged in the chamber (9) along the longitudinal axis (37) between the compression position in which it is positioned close to or adjoins the second compression element (23b, 32) and the ejection position in which it is situated at an axial distance from the second compression element (23b, 32), close to or outside of the ejection opening (36) wherein said axial distance is greater than an axial distance of said second compression element to the filling opening,said ejection member (10) is fixedly connected to an axial shaft (8) which enters through the second compression element (23b, 32) via a shaft seal (17) arranged in the second compression element (23b, 32), a fluid communication being present between the side of the ejection member (10) turned towards the first compression element (22) and the side facing towards the second compression element (23b, 32) of the ejection member (10), the circumference of the ejection member (10) being positioned at a certain distance from the inner wall (31) of the chamber (9) in such a way that free fluid transport between the circumference of the ejection member (10) and the inner wall (31) of the chamber (9) is possible,wherein the fluid supply channel (14) is arranged in the second compression element (23b,32), the fluid supply channel (14) discharging in the chamber (9) via the compression surface (23a) of the second compression element (23b, 32) and allows flushing of the chamber (9) via water supplied by the fluid supply channel (14) in the ejection position, the water being allowed to leave the chamber (9) past the ejection member (10). 2. The device (1) according to claim 1, wherein the ejection member (10) comprises a sieve member. 3. The device (1) according to claim 2, wherein the fluid supply channel (14) is connected to a supply opening in the second compression element (23b, 32) and the fluid discharge channel (3) extends in axial direction until through the first compression element (22). 4. The device (1) according to claim 3, wherein the fluid supply channel (14) discharges in a distribution volume (28) behind a distribution plate (23b) that is provided with discharge openings (24) distributed thereon for supplying, during use, hot water through the hot water supply via the distribution volume (28) to the chamber (9). 5. The device (1) according to claim 1, wherein the fluid supply channel (14) is connected to a supply opening in the second compression element (23b, 32) and the fluid discharge channel (3) extends in axial direction until through the first compression element (22). 6. The device (1) according to claim 5, wherein the fluid supply channel (14) discharges in a distribution volume (28) behind a distribution plate (23b) that is provided with discharge openings (24) distributed thereon for supplying, during use, hot water through the hot water supply via the distribution volume (28) to the chamber (9). 7. The device (1) according to claim 5, wherein the chamber (9) is displaceable by the displacement member (2, 4, 5, 13) to and from the first compression element (22) that is arranged in a fixed manner. 8. The device (1) according to claim 7, wherein the chamber (9) is provided with a cam for engagement with the ejection member (10) and axial displacement thereof when displacing the chamber (9) from the compression position to the ejection position. 9. The device (1) according to claim 1, wherein the chamber (9) is displaceable by the displacement member (2, 4, 5, 13) to and from the first compression element (22) that is arranged in a fixed manner. 10. The device (1) according to claim 9, wherein the chamber (9) is provided with a cam for engagement with the ejection member (10) and axial displacement thereof when displacing the chamber (9) from the compression position to the ejection position. 11. The device according to claim 10, wherein the chamber is displaceable along axial guiding rails (2). 12. The device (1) according to claim 11, wherein the shaft (8) at an end is detachably connected to a part (7a) of the device housing (25), wherein the shaft (8) has such a length that when displacing the chamber (9) to the ejection position the ejection member (10) is positioned near the ejection opening (36), and when displacing the chamber (9) from the filling position to the preparation position the ejection member (10) is taken along by the second compression element (23b, 32) wherein the detachable connection (7, 7a) is broken. 13. The device (1) according to claim 12, wherein the detachable connection (7, 7a) of the shaft with the part of the device housing (25) is formed by a magnetic connection. 14. The device (1) according to claim 13, wherein a heating member is mounted around the chamber (9). 15. The device according to claim 9, wherein the chamber is displaceable along axial guiding rails (2). 16. The device (1) according to claim 1, wherein the shaft (8) at an end is detachably connected to a part (7a) of a device housing (25), wherein the shaft (8) has such a length that when displacing the chamber (9) to the ejection position the ejection member (10) is positioned near the ejection opening (36), and when displacing the chamber (9) from the filling position to the preparation position the ejection member (10) is taken along by the second compression element (23b, 32) wherein the detachable connection (7, 7a) is broken. 17. The device (1) according to claim 16, wherein the detachable connection (7, 7a) of the shaft with the part of the device housing (25) is formed by a magnetic connection. 18. The device (1) according to claim 1, wherein a heating member is mounted around the chamber (9).
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