System and method for homogenizing ground coffee

Abstract

A tool for homogenizing coffee grounds in a filter basket, the tool comprising: a tool wall (30) for engaging a top end of the filter basket; a structure (50) rotatable with respect to the tool wall; and at least one stirring element (14) connected to the rotatable structure (50) for extending into the filter basket, wherein the at least one stirring element is connected to the structure (50) via a coupling (110) comprising a hinge, allowing movement of the respective stirring element with respect to the rotatable structure, when the stirring element is moved through the coffee grounds by rotation of the rotatable structure.

Description

[0001] Title: SYSTEM AND METHOD FOR HOMOGENIZING GROUND COFFEE

[0002] FIELD OF THE INVENTION

[0003] The present disclosure relates to a system and method for homogenizing ground coffee.

[0004] BACKGROUND OF THE INVENTION

[0005] The enormous popularity of coffee throughout the world has led to an explosion of efforts to optimize each and every step in the coffee making process. The aim is the prefect cup of coffee.

[0006] Referring to Figure 1 , typically, extracting a cup of espresso includes the steps of grind roasted coffee beans; Filling a filter device 1 , typically included in a portafilter holder 2, with a certain amount of grinded coffee; The coffee in the portafilter is compressed into what can be referred to as a puck; and finally pressurized hot water is led though the puck of compressed coffee in the portafilter, extracting a stream of coffee 4 from the puck.

[0007] A bottomless portafilter 2, as shown in Figures 1 and 2, can be used to review the quality of the coffee extraction. Figure 1 shows an example of very good extraction. Herein, the stream of extracted coffee 4 coming out of the bottom of the filter basket is focused. Figure 2 shows an example wherein a stream 6 of extracted coffee is suboptimal.

[0008] The suboptimal stream 6 shown in Figure 2 provides an example wherein the coffee extraction is messy, indicating that extraction issues are happening inside the filter basket 1. Typically, the latter include so-called channeling. The extraction issues ultimately lead to not only a messy counter, but to a poorly extracted shot of espresso as well.

[0009] Channeling herein relates to the channels in the coffee puck. Water will follow the path of least resistance, and this is particularly true when water is under pressure, such as during coffee extraction. If the coffee in the filter 1 is unevenly ground, or improperly distributed and / or tamped, water will not flow uniformly through the coffee grounds. If there are gaps or inconsistencies in the coffee grounds, the high pressure water will flow faster through these areas, creating what is called "channeling." Channeling may e defined as when the extracted coffee finds a specific narrow path through the bed of coffee instead of flowing through the entire bed evenly. This leads to why channeling is so bad, it ruins the clarity of flavor of the espresso. The more evenly the coffee grounds are distribute in the filter basket, the less likely it is to see instances of channeling.

[0010] Channeling inside the coffee grounds in the filter 1 may typically lead to spurting, which is visible in the form of streams or jets of liquid spraying from the filter basket. See Figure 2 for an example. After brewing, it may be possible to observe holes or cracks in the spent coffee grounds, which can be a sign that channeling has occurred.

[0011] Not only is channeling messy, but it also indicates that the coffee grounds are extracted unevenly. The areas of higher flow, i.e. in the channels, will tend to be over extracted, while the rest of the coffee grounds will tend to be under extracted. This leads to, for instance, improper flavors and an unbalanced espresso.

[0012] Saint Anthony Industries sells a product called the BT Wedge Distribution Tool. The tool limits channeling by gently spreading the coffee grounds evenly across the surface of the portafilter basket.

[0013] The Weiss Distribution Technique (or WDT) has been documented, for instance on the online coffee forum home-barista.com, as a method utilizing needles to break up clumps, homogenize the coffee, and achieve perfect espresso puck preparation. WDT can be done with hand-held tools provided with thin needles to distribute the coffee.

[0014] Strategic Exits LLC, doing business as Weber Workshops, sells a tool called The MOON RAKER™. The tool takes the WDT concept and mechanizes it with a calculated and calibrated spirographic movement to ensure perfect homogeneity. While other WDT tools create endless trenches along the same path, the MOONRAKER's mechanism randomizes the needle movements to homogenize the coffee bed. The Moonraker tool can be positioned on the filter basket of a portafilter, with the needles extending into the bed of coffee grounds. When an operator rotates an upper part of the tool, the needles attached to a lower part are activated and perform perfectly calculated spirographic movement through the puck for flawless coffee powder homogenization.

[0015] However, conventional steps and tools to prevent channeling, such as the WDT tools referenced above, significantly add to the time required to prepare the coffee puck before extraction. In addition, to be able to correctly operate the homogenization tools, a barista requires significant amounts of training and knowledge.

[0016] OBJECT OF THE INVENTION

[0017] The present disclosure aims to provide an improved system and method to obviate channeling, or at least to provide an alternative system and method.

[0018] SUMMARY OF THE INVENTION

[0019] Aspects of the present invention are set out in the accompanying claims. The disclosure provides a tool for homogenizing coffee grounds in a filter basket according to claim 1. The tool comprises: a tool wall for engaging a top end of the filter basket; a structure rotatable with respect to the tool wall; and at least one stirring element connected to the rotatable structure for extending into the filter basket, wherein the at least one stirring element is connected to the rotatable structure via a coupling, e.g. comprising a hinge, allowing movement of the respective stirring element with respect to the rotatable structure, for example when the stirring element is moved through the coffee grounds by rotation of the rotatable structure.

[0020] The tool of the disclosure provides a relatively simple yet effective means to distribute coffee grounds in a filter basket, thereby limiting the chances of and potentially preventing channeling, and optimizing the flavor of the extracted coffee.

[0021] For example, in use, upon providing ground coffee in a filter basket, the tool wall may be positioned on the filter basket, upon which the rotatable structure is rotated, such that the at least one stirring element is moved through the coffee grounds.

[0022] The rotatable structure may be manually movable, e.g. comprise a hand gripping surface, and / or be configured to be moved by a drive system, e.g. be operatively connected thereto. The rotatable structure may be configured to be rotated by a force exerted on the hand gripping surface and / or by the drive system.

[0023] The stirring element is mounted to the rotatable structure such that movement with respect thereto is allowed, e.g. the orientation of the stirring element with respect to the rotatable structure may be dependent on the rotation movement of the rotatable structure, e.g. on a direction, speed and / or pattern of the rotation. The rotatable structure may be configured to co-rotate the at least one stirring element through the filter basket with rotation of the rotatable structure.

[0024] As such, upon rotation of the rotatable structure, the stirring element may move through the coffee grounds due to various factors, such as centrifugal forces, rotational velocity, length and weight of the stirring element and / or friction with the coffee. The stirring element may be rotatably mounted to the rotatable structure in such a way that, even if the rotatable structure is rotated, the movement path of stirring element itself is at least partially dependent on the friction with the ground coffee.

[0025] By having at least one stirring element that is movable with respect to the rotatable structure upon rotation of the rotatable structure, the movement of the stirring element through the coffee grounds may be relatively random, compared to a stirring element that follows a predetermined path, e.g. a spirograph-like path. The random movement may further improve homogenization of the coffee. Therewith, the present invention may provide an improved distribution tool, that may provide more evenly homogenized coffee, a reduced preparation time and / or which potentially requires less training and knowledge for correct operation.

[0026] The coupling may be a separate element arranged between the rotatable structure and the stirring element, and / or may be integral with the rotatable structure and / or the stirring element, e.g. be formed by the attachment region of the rotatable structure and / or the stirring element. The coupling may comprise a hinge. The hinge may be configured to allow a rotation movement of the at least one stirring element, e.g. about a first axis. The coupling may be configured to transfer a substantially tangential movement to the stirring element. The coupling may be free from actuators, e.g. gears.

[0027] The at least one stirring element may be rotatably mounted with respect to the rotatable structure via the coupling. As such, the at least one stirring element may be freely movable through the filter basket. The at least one stirring element may comprise a first end region that extends from the coupling and an opposite second end region that extends into the filter basket. When the filter basket is filled with coffee grounds, the at least one stirring element may be pulled through the coffee grounds by the rotatable structure via the coupling, e.g. with the first end region, whereby movement of the at least one stirring element through the coffee grounds, e.g. near the second end region, is influenced by interaction with the coffee grounds.

[0028] In an embodiment, the tool can be integrated with a coffee grinder, thus providing significant time savings in the preparation of a perfectly distributed puck of coffee grounds.

[0029] The tool may comprise multiple stirring elements, e.g. multiple stirring elements that are integrally connected to each other. Multiple stirring elements may be jointly rotatably connected to the rotatable structure via the coupling. Multiple couplings may be provided, each having one or multiple stirring elements connected thereto. It has been found that this way, the connected stirring elements may exert forces on each other to contribute to the homogenization.

[0030] A position and / or a size of the stirring elements may influence their respective movement. For example, a stirring element located near the tool wall may experience a relatively large friction force compared to a stirring element located further away from the tool wall and / or a stirring element having a larger mass may experience larger centrifugal forces, whereas stirring elements having a larger surface may experience larger friction forces with the coffee grounds. By having multiple connected stirring elements, a relatively uniform motion of the respective connected stirring elements may be achieved. In an embodiment, the rotatable structure is rotatable about a first axis and the at least one stirring element is rotatable with respect to the rotatable structure about a second axis offset from the first axis. The first axis may be arranged at a predetermined distance from the second axis. For example, the first axis may be arranged in the center of the rotatable structure, whereas the second axis is arranged towards an outer edge of the rotatable structure. Multiple stirring elements may be rotatably connected to the rotatable structure to be rotatable about respective additional axes offset from each other and offset from the first axis. For example, another stirring element may be rotatable about a third axis offset from the first and second axes. The second and third axes may be arranged at different or the same distances from the first axis. The second axis, third axis and / or respective additional axes may be evenly distributed over a part of the rotatable structure, e.g. over a circumference region thereof. This way, distribution may be even more evenly.

[0031] In an embodiment, the first axis and the second axis are parallel and non-coaxial with respect to each other. This way, the at least one stirring element may be configured to, at the coupling, be set in orbital movement by the rotatable structure.

[0032] In an embodiment, the at least one stirring element comprises a needle. In a further embodiment, the at least one stirring element comprises multiple needles, e.g. a pair of needles. The multiple needles may be integrally connected to each other, and be together rotatably connected to the rotatable structure via the coupling. It has been found that a needle may provide for relatively homogeneous coffee grounds.

[0033] In an embodiment, the at least one stirring element, e.g. each pair of needles, comprises at least a first arm and a second arm extending on either side of the coupling, each arm comprising at least a radial section extending substantially radially, e.g. at least in radial direction, with respect to the rotatable structure, for example towards the rotation axis of the rotatable structure. The first arm and second arm may be arranged such that, when the rotatable structure is rotated in a first direction, e.g. clockwise, the at least one stirring element rotates about the coupling with the first arm towards a first end position, whereas when the rotatable structure is rotated in a second direction opposite to the first direction, e.g. counterclockwise, the at least one stirring element rotates about the coupling with the second arm towards a second end position opposite to the first end position. This way, the homogenization may be made dependent on the rotation direction of the rotatable element and may be even more constant by varying, e.g. alternating, the rotation direction.

[0034] In an embodiment, the radial section of the first arm has a different length than the radial section of the second arm. The different lengths may be such that homogenization of the coffee grounds may be even more constant. Furthermore, rotation towards the first and / or second end position may be more effectively due to varying friction on the first and second arm.

[0035] In an embodiment, the at least one stirring element, e.g. a vertical section thereof, comprises a non-circular cross section. The at least one stirring element may for example comprise a substantially flat cross section e.g. in the vertical section. The substantially flat cross section may e.g. be obtained by pressing the at least one stirring element. The at least one stirring element may for example comprise a first side defining a length of the at least one stirring element and second side defining a width of the at least one stirring element, wherein the width is smaller than the length. It has been found that by having a mutually different length and width, the effect of the at least one stirring element moving through the coffee grounds may be made dependent on a rotation direction of the at least one stirring element.

[0036] The first side of the at least one stirring element may be arranged such that it forms the front side when the rotatable structure is rotated in a first direction, e.g. when the at least one stirring element is arranged in a first end position. The second side of the at least one stirring element may be arranged such that it forms the front side when the rotatable structure is rotated in a second direction, e.g. when the at least one stirring element is arranged in a second end position. This way, the stirring element may homogenize, e.g. smoothen, distribute, declutter and / or deblumble, the coffee grounds in a different way in dependence of the rotation direction.

[0037] The width may for example be less than 1 mm, for example less than 0,5 mm. The length may be less than 3 mm, for example less than 1 ,5 mm. The length may for example be at least two times the width, for example 3 times the width. It has been found that these dimensions are especially advantageous for homogenizing the coffee ground in two subsequent steps.

[0038] In an embodiment, the coupling defines a range of motion, wherein the movement of the stirring element within the range of motion is due to interaction of the respective stirring element with the coffee grounds. For example, the coupling and / or the stirring element may be arranged to define a first end position and / or an opposite second end position of the at least one stirring element, e.g. about the second axis. The coupling may be configured to prevent movement of the at least one stirring element past the first end position and / or the second end position, e.g. due to interaction between the stirring element and the rotatable structure. The range of motion may be similar for each coupling or vary for each coupling.

[0039] In an embodiment, the range of motion is defined as an angle of rotation (a), e.g. an angle of rotation with respect to the structure. The angle may e.g. be defined as the angle of the at least one stirring element between the first end position and the second end position. The angle a allowed by the coupling may be in the range of about 1 to 45 degrees, for instance in the range of 20 to 30 degrees.

[0040] In an embodiment, a top end of the tool has an open structure allowing coffee grounds to pass. This way, the tool may potentially be used while and / or after coffee grounds are provided in the filter basket, for example when the filter basket is arranged in a coffee mill.

[0041] In an embodiment, the tool comprises a lattice structure connected to the rotatable structure, the lattice structure having one or more openings for forming the open structure. The lattice may allow coffee grounds to pass through the lattice, into the filter basket and thereby allow homogenization during and / or shortly after providing the coffee grounds therein. Therewith, the lattice structure itself may contribute to homogenization of the coffee grounds when coffee grounds pass the lattice structure, before coming into contact with rotation of the at least one stirring element.

[0042] In an embodiment, the at least one stirring element comprises at least one stirring element, e.g. a number of stirring elements, such as needles, which are connected to the lattice structure. Each of the stirring elements may be connected to the lattice structure, e.g. via a respective coupling comprising a hinge.

[0043] In an embodiment, the at least one stirring element comprises a radial section and a vertical section for extending into the coffee grounds. The radial section may extend substantially transverse, e.g. perpendicular, to the first rotation axis of the rotatable structure. The vertical section may extend at least partially transverse, e.g. perpendicular, to the radial section, and may e.g. extend at least partially parallel to the first rotation axis, for example substantially vertical in use of the tool.

[0044] In an embodiment, each radial section is provided with a vertical section for extending into the coffee grounds.

[0045] In an embodiment, the at least one stirring element comprising a number of stirring elements having at least a radial section, wherein the radial sections of respective stirring elements have a different length. It has been found that this way, during rotation of the rotatable structure, the stirring elements may each homogenize specific areas of the coffee grounds.

[0046] In an embodiment, the at least one stirring element comprises a curved needle. It has been found that the curved needle shape may contribute to homogenization.

[0047] In an embodiment, the curved needle extends at least partially planar with respect to the rotatable structure and via a curved section at least partially perpendicular with respect to the plane of the rotatable structure. By varying the perpendicular extension, different areas of coffee grounds may be homogenized more or less intensively. In an embodiment, the tool comprises a drive system for rotating the rotatable structure with respect to the tool wall. In addition and / or alternative to the drive system, the tool may comprise a hand gripping surface and / or another hand driving element, such as a structured surface or grip.

[0048] In an embodiment, the drive system comprises one or more of a battery, a motor, and a transmission to transmit movement of the motor to the rotatable structure. The , transmission may for example be selected from a gear drive, a magnetic drive, and a belt drive.

[0049] In an embodiment, the drive system is configured to rotate the rotatable structure with random speeds, varying speeds, varying direction, and / or to vibrate the rotatable structure. It has been found that by varying speed, direction and / or by vibrating the rotatable structure, the movement of the at least one stirring element may be adapted in order to achieve a desired homogenization result. For example, the movement may be adapted to coffee type, grinding degree, filling level of the filter, et cetera.

[0050] The drive system may be configured to rotate the rotatable structure in a first direction, such that the at least one stirring element is moved with respect to the rotatable structure towards a first end position, wherein the drive system is configured to subsequently rotate the rotatable structure in a second direction, such that the at least one stirring element is moved with respect to the rotatable structure towards an opposite second end position. This way, a stirring element may homogenize different regions of the coffee grounds in dependence of the rotation direction.

[0051] The drive system may be configured to rotate a predetermined amount, e.g. distance and / or time, in the first direction when the at least one stirring element is in the first end position, and / or to rotate a predetermined amount, e.g. distance and / or time, in the second direction when the at least one stirring element is in the second end position. This way it may be relatively certain that a certain path has been followed by the at least one stirring element, and the homogenization may be further improved.

[0052] According to a second aspect, the disclosure provides a tool for homogenizing coffee grounds in a filter basket, the tool comprising: a tool wall for engaging a top end of the filter basket; a structure rotatable with respect to the tool wall; and at least one stirring element connected to the rotatable structure for extending into the filter basket, wherein a top end of the tool has an open structure allowing coffee grounds to pass.

[0053] The embodiments of the tool according to the first aspect of the invention as disclosed herein may be provided in the tool according to the second aspect of the invention and thereby provide similar advantages. Various individual aspects and features of the tool according to the first aspect of the invention can individually provide advantages as described in the application in a tool according to the second aspect. These aspects or features can be made subject of divisional patent applications.

[0054] In an embodiment, the tool comprises a lattice structure connected to the rotatable structure, the lattice structure having one or more openings for forming the open structure.

[0055] In an embodiment, the at least one stirring element comprises a number of needles which are connected to the lattice structure.

[0056] In an embodiment, each radial section is provided with a vertical section for extending into the coffee grounds.

[0057] In an embodiment, the at least one stirring element comprising a number of stirring elements having at least a radial section, wherein the radial sections of respective stirring elements have a different length.

[0058] In an embodiment, the at least one stirring element comprises a curved needle.

[0059] In an embodiment, the curved needle extends at least partially planar with respect to the rotatable structure and via a curved section at least partially perpendicular with respect to the plane of the rotatable structure.

[0060] In an embodiment, the tool comprises a drive system for rotating the rotatable structure with respect to the tool wall.

[0061] In an embodiment, the drive system comprises one or more of a battery, a motor, and a transmission to transmit movement of the motor to the rotatable structure, wherein the transmission is selected from a gear drive, a magnetic drive, and a belt drive.

[0062] In an embodiment, the drive system is configured to rotate the rotatable structure with random speeds, varying speeds, varying direction, and / or to vibrate.

[0063] According to another aspect, the disclosure provides an assembly of a portafilter, a filter basket arranged in the portafilter for receiving coffee grounds, and a tool according to any of the embodiments as described herein engaging the filter, wherein the at least one stirring element of the tool at least partially extends into the filter basket. The tool may be provided on the portafilter, such that the stirring elements, upon rotation, can homogenize the coffee grounds.

[0064] According to an aspect, the disclosure provides a coffee grinder provided with an assembly according to any of the embodiments as described herein.

[0065] According to yet another aspect, the disclosure provides a method of homogenizing coffee grounds in a filter basket, the method comprising the steps of:

[0066] - arranging a filter basket for receiving coffee grounds in a portafilter, - arranging a tool for homogenizing coffee grounds on the filter basket, the tool comprising: a structure rotatable with respect to the filter basket; and at least one stirring element rotatably connected to the rotatable structure for extending into the filter basket;

[0067] - rotating the rotatable structure of the tool to homogenize the coffee grounds in the filter basket due to movement of the at least one stirring element, e.g. with respect to the rotatable structure, through the coffee grounds.

[0068] The method may be performed using the tool according to any of the embodiments disclosed herein, and thereby provide similar advantages as described herein for the tool.

[0069] In an embodiment, the step of rotating comprises rotating the rotatable structure about a first axis, e.g. a center axis of the rotatable structure, causing rotational movement of the at least one stirring element about a second axis offset from the first axis.

[0070] In an embodiment, the at least one stirring element comprises a pair of needles connected to the rotatable structure via a coupling, the coupling allowing a range of motion for the respective pair of needles to rotate with respect to the rotatable structure.

[0071] In an embodiment, the step of rotating the rotatable structure comprises rotating the rotatable structure in a first direction, e.g. clockwise, over a first distance, and rotating the rotatable structure in an opposite second direction, e.g. counterclockwise, over a second distance. The rotations in both direction may be performed about the same axis, e.g. the first axis, such as a center axis of the rotatable structure.

[0072] In an embodiment, during the rotation of the rotatable structure in the first direction, the at least one stirring element is moved with respect to the rotatable structure, e.g. due to interaction with the coffee grounds, towards a first end position, and during rotation of the rotatable structure in the second direction, the at least one stirring element is moved with respect to the rotatable structure, e.g. due to interaction with the coffee grounds, towards a second end position opposite to the first end position.

[0073] In an embodiment, the method comprises the step of repeating the step of rotating the rotatable structure in the first direction, e.g. clockwise, over a first distance and rotating the rotatable structure in the second direction, e.g. counterclockwise, over a second distance a number of times.

[0074] In an embodiment, the second distance is different than the second distance. In an embodiment, the method further comprises the steps of:

[0075] - moving the assembly of the portafilter, the filter basket and the tool to a docking location of a coffee grinder (70); and

[0076] - activating the coffee grinder to provide coffee grounds in the filter basket; wherein the step of rotating the rotatable structure is performed while the assembly is arranged in the docking location, e.g. during and / or after the step of activating the coffee grinder.

[0077] In an embodiment, the step of receiving the coffee grounds in the filter basket comprises passing the coffee grounds through an open structure provided at a top end of the tool.

[0078] In an embodiment, the tool comprises a drive system, and the step of rotating the rotatable structure comprises using, e.g. activating, the drive system to do one of more of: rotating the rotatable structure with random speeds, rotating the rotatable structure with varying speed, rotating the rotatable structure in varying directions, and / or vibrating the rotatable structure.

[0079] Various embodiments of the tool as disclosed herein may be provided in the assembly and / or in the coffee grinder and / or the method may be performed using a tool according to any of the embodiments as disclosed herein, and thereby provide similar advantages. Various individual aspects and features of the tool can individually provide advantages as described in the application in a tool that is not according to the present invention. These aspects or features can be made subject of divisional patent applications.

[0080] BRIEF DESCRIPTION OF THE DRAWINGS

[0081] Reference will be made to the figures on the accompanying drawings. The figures are schematic in nature and may not necessarily be drawn to scale. Similar reference numerals denote similar parts. On the attached drawing sheets:

[0082] Figure 1 shows a perspective view of a bottomless portafilter and filter basket, exemplifying optimal coffee extraction;

[0083] Figure 2 shows a perspective view of a bottomless portafilter and filter basket, exemplifying sub-optimal coffee extraction;

[0084] Figure 3 shows a perspective and in part cut-away view of an embodiment of a homogenization tool;

[0085] Figure 4 shows a detail of Figure 3;

[0086] Figure 5 shows a perspective view of an embodiment of a homogenization tool combined with a coffee grinder; Figure 6 shows a perspective and cut-away view of an embodiment of a homogenization tool;

[0087] Figure 7 shows a detail of Figure 6;

[0088] Figure 8 shows a perspective view of another embodiment of a homogenization tool;

[0089] Figure 9 shows a top view of yet another embodiment of a tool of the present disclosure;

[0090] Figure 10A shows a top view of an embodiment of a tool of the present disclosure wherein the needles of the tool are in an intermediate position;

[0091] Figure 10B shows a perspective view of the embodiment of Fig. 10A;

[0092] Figures 11 A and 11 B show a top view and a perspective view respectively of the tool of Fig. 10A, exemplifying rotation of the tool in counterclockwise direction;

[0093] Figures 12A and 12B show a top view and a perspective view respectively of the tool of Fig. 10A, exemplifying rotation of the tool in clockwise direction;

[0094] Figure 13 shows a perspective view of a detail of Figure 10B; and

[0095] Figure 14 shows a top view of a tool of the present disclosure schematically indicating movements and relative forces during operation.

[0096] Figure 15A shows a perspective view of a tool according to another embodiment;

[0097] Figure 15B shows a top view of the tool of Fig. 15A, wherein the rotatable structure is rotated in a first direction; and

[0098] Figure 15C shows a top view of the tool of Fig. 15B, wherein the rotatable structure is rotated in an opposite second direction.

[0099] DETAILED DESCRIPTION

[0100] The invention will be further elucidated in exemplary embodiments thereof as described below.

[0101] Generally referring to Figure 3, the disclosure provides a distribution tool 10 which can be positioned on the portafilter 2, also known as a filter holder. The tool 10 has an open structure 12. The open structure allows coffee grounds to pass. This allows the tool to be positioned on the portafilter before the coffee grounds are put in the filter 1. Hence, the tool may be referred to as an "in-situ distribution tool." The tool 10 is provided with at least one stirring element 14. The at least one stirring element can comprise any element suitable for distributing the coffee grounds. The stirring element can comprise, for instance, one of more of a needle, a spoon shaped element, a helical element, and / or a spiraling element. In an embodiment, the tool comprises a number of needles 14 for distributing coffee grounds.

[0102] The filter holder 2 herein typically comprises a handle 20 for holding the portafilter. At the end of the handle, a cup shaped element 22 is provided having a lower end with an outlet 24 for coffee. The outlet 24 may be provided with guide means 26, ending in for instance a sprout 28. The cup 22 typically has a cylindrical wall 26. A filter basket 1 to receive coffee grounds can be positioned in the cup 22 (not shown in Fig. 4, but similar to Fig. 1). Herein, the filter 1 typically has a flange or some other means to engage the upper end 28 of the wall 26.

[0103] The distribution tool 10 may be provided with a cylindrical tool wall 30. Said tool wall 30 may fit around the outside of the portafilter wall 26. The tool wall 30 may be provided with a shoulder 32 to engage the flange of the filter 1 and / or the top end 28 of the portafilter wall 26.

[0104] The tool may be equipped with a drive system 40. The drive system may include a housing 42. The housing may include one or more of a battery, a motor, and controls. The housing 42 can be provided with a button 44 for activating the motor.

[0105] Referring to Figure 4, the tool 10 can comprise a rotatable structure 50. The structure 50 may be rotatable with respect to the tool wall 30. The rotatable structure may be a ring. The structure 50 may for instance be provided with an outer surface provided with toothing 52. A gear of the drive system can engage the toothed surface of the ring to rotate the ring 50. The rotatable structure 50 can have other shapes than the circular shape as depicted in the drawings. For instance, the rotatable structure 50 may have, for instance, a hexagonal, an octagonal, and / or a partly interrupted shape.

[0106] The open structure 12 of the tool has openings 60 to allow coffee grounds to pass through. The open structure 12 may, for instance, comprise a lattice or grate 62. The lattice can be connected to, or be integral with, the ring 50. The needles 14 can be connected to the lattice 62. The stirring elements, i.e. needles 14, may each be rotatably connected to the lattice 62 via a coupling 111 allowing movement of the stirring element 14 with respect to the rotatable structure 12 when the stirring element is moved through the coffee grounds by rotation of the rotatable structure 12. In particular, needles may be connected via flexible coupling 111 , e.g. a glue, allowing movement of the respective needle in a corresponding recess 113 provided in the rotatable structure 12. The rotatable structure 12 is configured to co-rotate the at least one stirring element 14 through the filter basket with rotation of the rotatable structure 12. As an alternative, one or more of the stirring elements 14 may be rigidly connected to the rotatable structure 12.

[0107] Generally referring to Figure 4, the open top structure 12 of the distribution tool 10 enables to include the tool in a coffee grinder 70. Herein, the tool 10 may be integrated with the grinder 70. Alternatively, the tool 10 can be positioned on the portafilter, and the assembly of portafilter and tool can be positioned at the grinder 70 to received grinded coffee. In use, the tool 10 may be positioned on the portafilter 2. Subsequently the assembly of the portafilter and the tool 10 can be positioned at an appropriate docking location of the grinder 70 for receiving grinded coffee grounds, as exemplified in Figure 4. The grinder 70 provides coffee grounds which can pass the open structure 12 of the tool 10 and fall into the filter 1 of the portafilter 2. Subsequently, the tool 10 can be activated to move the needles through the coffee grounds, thereby homogenizing the coffee in the filter 1. Herein, the motor system 40 drives the ring 50. Attached to the ring 50 is the lattice 62 including the pins 14 which extend into the portafilter and into the coffee grounds. Rotating the ring 50 moves the pins 14 through the coffee to distribute the coffee in the portafilter 2.

[0108] In an embodiment, the drive system 40 is able to vibrate. Vibrating is another way to distribute the coffee grounds in the filter basket. Herein, after grinding of the coffee, the drive system can be activated to vibrate. The vibrations are transferred mechanically to the portafilter 2, the filter 1 in the portafilter 2 and thus to the coffee grounds in the filter. Also, the vibrations can be transferred to the coffee grounds via the needles 14. The vibrations will distribute the coffee grounds. Vibration may be used in conjunction with rotation of the needles 14. In a practical embodiment, the drive system 40 can vibrate by high-frequent driving of its motor.

[0109] The coffee grinder 70 can be any suitable grinder. In a practical embodiment, the grinder 70 is automatic. Automatic coffee grinders are available on the market. For instance, automatic grinders are available from companies such as Sage Appliances GmbH [DE] or Fiorenzato [IT], The open structure of the distribution tool of the present disclosure allows to integrate the homogenization step with the step of grinding coffee beans.

[0110] Thus, the homogenization tool of the disclosure can be used while, or shortly after, grinding the coffee. Also, the homogenization can be automated, using the drive system. Thus, the tool 10 of the disclosure simplifies coffee homogenization and saves a lot of time, while optimizing the flavor of the extracted coffee by homogenizing the coffee grounds in the filter and preventing channeling.

[0111] The most significant advantage is the simplicity of the distribution tool. Without any significant training, a starting barista may be able to use the tool 10, dock the assembly of tool and portafilter in an automatic grinder 70, and within a limited amount of time provide a perfectly homogenized puck of coffee grounds to extract a perfectly flavored cup of espresso.

[0112] In a practical embodiment, the tool 10, the filter 1 and / or the portafilter holder 2 may be provided with one or more sensors. The sensors can be used to measure one or more of the flow rate, pressure, temperature, and direction of the water flow through the coffee puck in the filter 1 in the filter holder 2. The sensors may be wireless and can be connected to a base station able to receive, process and display the measured values.

[0113] Generally referring to Figures 6 and 7, in an embodiment, the drive system 40 may include a magnetic coupling between the motor and the needles 14. For instance, the ring 50 may be provided with a flange 80 extending radially outward. The drive system 40 may be provided with a magnetic bearing 82 for holding and rotating the flange 80. For instance, the flange can be provided with one or more permanent magnets. The magnetic bearing 82 may be provided with electro magnets, which can be operated to control the rotation of the magnetic flange 80. Herein, the electro magnets can switch polarity at a certain frequency to drive and control the speed of rotation of the flange. The tool may be provided with one or more seals 84 to prevent coffee grounds from entering the drive system.

[0114] The magnetic bearing shown in Figures 6 and 7 allows the ring 50 to be removed easily and quickly. Thus, the tool can be cleaned to remove coffee grounds.

[0115] Generally referring to Figure 8, in which another embodiment of a homogenization tool 10 is shown. The tool 10 comprises a tool wall 30 for engaging a top end of the filter holder 2 of the filter basket, a structure 50 rotatable with respect to the tool wall. At least one stirring element 14 is connected to the rotatable structure 50 for extending into the filter basket, wherein the at least one stirring element is connected to the structure 50 via a coupling 110, e.g. a hinge, allowing movement of the respective stirring element 14 with respect to the rotatable structure 50.

[0116] The structure 50 may be configured to be rotated by a force exerted on a hand gripping surface, e.g. an outer surface thereof. Additionally and / or alternatively, the rotatable structure 50 is configured to be rotated via a drive system 40, which in the shown embodiment comprises a belt drive, but may additionally and / or alternatively comprise a motor, toothing 52, and / or a magnetic coupling, for example as described in the embodiments hereinabove. In use, the at least one stirring element 14 is freely movable through the filter basket about respective vertical rotation axis R2 defined by the coupling 110 and the rotatable structure 50 is configured to co-rotate the at least one stirring element through the filter basket 1. The at least one stirring element 14 comprises a first end region 141 that extends from the coupling 110 and an opposite second end region 142 that extends into the filter basket 1. When the filter basket 1 is filled with coffee grounds, the at least one stirring element 14 can be pulled through the coffee grounds by the rotatable structure 50 via the coupling 110, at the first end region, whereby movement of the at least one stirring element 14 through the coffee grounds, e.g. near the second end region 142, is influenced by interaction with the coffee grounds. The rotatable structure 50 is rotatable about a first axis R1 and each at least one stirring element 14 is rotatable with respect to the rotatable structure 50 about a respective second axis R2 offset from the first axis. The first axis R1 is arranged at a predetermined distance from the respective second axes R2. In particular, the first axis R1 is arranged in the center of the rotatable structure, whereas the second axes R2 are each arranged towards an outer edge of the rotatable structure 50. Multiple stirring elements 14 are each connected to the rotatable structure 50 to be rotatable about respective additional axes R2 offset from each other and offset from the first axis R1. The second axes R2 are evenly distributed over a part of the rotatable structure 50, e.g. over a circumference region thereof. The first axis R1 and the second axis R2 are parallel and non-coaxial with respect to each other. The at least one stirring element 14 is configured to, at the coupling 110, be set in orbital movement by the rotatable structure 50.

[0117] In the shown embodiment of Fig. 8, the stirring elements 14 are needles having a special configuration, e.g. having a curled shape. However, the needles may also have different shapes and comprise one or multiple arms. For example, the stirring elements may be shaped as a hook comprising one or two arms, as in Figs. 9-13. In Fig. 8, the needles 14 are not straight, but are shaped semi-chaotic. Every needle may be bent in a different manner. The curvature of the respective needles 14 provides flexibility. One or multiple of the stirring elements 14, i.e. the needles, may be connected directly and statically to the ring 50. Further, the top end of the tool is open to allow coffee grounds to pass.

[0118] Upon rotation of the ring 50, the curved needles 14 will also rotate and move through the coffee grounds in the filter 1. Due to the curvature of the needles, coffee grounds may be homogenized more evenly. The rotation of the rotatable structure may be performed such that the needles 14will vibrate. Due to the vibration, the paths of the needles through the coffee will become more chaotic, which in turn further improves the homogenization of the coffee puck.

[0119] Figure 8 shows another example of the drive system 40 having a motor 90, battery 92, and buttons 94, 96. The motor may drive a wheel 98. The wheel can be connected to the ring 50 via a drive belt 100.

[0120] Generally referring to Figure 9, in an embodiment, the one or more needles 14 comprise a pair of needles. At the coupling 110, the respective needle is connected to the ring 50. Each pair of needles comprises a first arm 112 and a second arm 114 extending on either side of the coupling 110, each arm comprising at least a radial section extending substantially radially, e.g. at least in a radial direction, such as towards the rotation axis R1 of the rotatable structure 50. The first arm 112 and second arm 114 are arranged such that, when the rotatable structure 50 is rotated in a first direction, e.g. clockwise, the stirring elements 14 rotate about the ais R2 of the coupling 110 with the first arm 112 towards a first end position, e.g. as shown in Figs. 12A-12B, whereas when the rotatable structure 50 is rotated in a second direction opposite to the first direction, e.g. counterclockwise, the at least one stirring element rotates about the coupling with the second arm towards a second end position opposite to the first end position, e.g. as shown in Figs. 11 A-11 B.

[0121] In this embodiment, each stirring element 14 comprises a radial section 120, 122 extending perpendicular to the first rotation axis R1 and a vertical section 124, 126 for extending into the coffee grounds. The vertical section 124, 126 of each stirring element 14 extends at least partially transverse, e.g. perpendicular to the radial section 120, 122 and at least partially parallel to the first rotation axis R1 , e.g. substantially vertical in use of the tool 10.

[0122] The radial section of the first arm 112 and the radial section of the second arm 114 have a different length, such that homogenization of the coffee grounds may be even more constant and friction between the coffee grounds differs between the first arm 112 and the second arm 114.

[0123] The coupling 110 and / or the stirring element 14 are arranged to define the first end position and the opposite second end position of each stirring element 14 about the respective second axis R2. The coupling 110 is configured to prevent movement of the at least one stirring element 14 past the first end position and / or the second end position, in which the at least one stirring element abuts the rotatable structure. The range of motion is similar for each coupling but may alternatively vary.

[0124] As shown in more detail in Fig. 13, the coupling 110 may comprise a pen 150 connected to the ring. The pen 150 may be arranged between two flanges 152, 154 each connected to the ring 50. The needle 14 may be connected to the pen 150, for instance having a curled section 156 which is curled one or more times around the pen 150.

[0125] In the shown embodiment, each needle 14 comprises two arms 112, 114. Each arm may extend on either side of the coupling 110. Each arm may extend at least in part circumferentially along the ring, see arm sections 116, 118. Each arm may extend at least in part radially towards a center of the ring 50, see radial sections 120, 122. At the radial ends of the radial sections, the arms are provided with vertical sections 124, 126 for extending into the bed of coffee grounds.

[0126] Optionally, the ring 50 may be provided with a limiter 130, for limiting movement of the respective pair of needles. In the embodiment shown, see for instance Figures 9 and 13, the limiter 130 comprises an eye, basically a U-shaped loop connected to the ring 50 and enclosing one of the circumferential arm section 118. Thus, the limiter 130 restricts the movement of the circumferential arm section 118 to the range of motion available within said loop. Optionally, two limiters 130 may be provided, one for each arm 112, 114.

[0127] The coupling 110 allows the pair of needles to rotate within a limited range. In the embodiments shown in Figures 9 to 13, the coupling 110 allows the pair of needles to rotate around the respective pen of the coupling 110 until either one of the circumferential arm sections 116, 118 engages the inner surface of the ring 50. In a practical embodiment, the range of rotation is defined as an angle of rotation a. The angle may be defined as the angle of the at least one stirring element 14 between the first end position and the second end position. The angle a

[0128] (see Figure 10) allowed by the coupling 110 may be in the range of about 1 to 45 degrees, for instance in the range of 20 to 30 degrees. The angle a herein indicates a difference between opposite extremes of radial directions of the radial arms 112, 114.

[0129] A challenge for the tool 10 is to provide the right mix of the coffee grounds. Herein, the vertical needle sections 124 nearer to the center of the ring 50 rotate at a slower rate than the vertical needle sections 126 nearer to the outside circumference of the ring. A vertical needle section located exactly in the middle of the ring 50 would normally only rotate around is own longitudinal axis, and will not have a translational velocity when the ring is rotated. By having a stirring element rotatable with respect to the rotational structure, a stirring element may rotate between the first and second position, and thereby provide homogenization in dependence of ration direction, e.g. move through the middle point with a larger velocity.

[0130] The embodiment of Figures 9 to 13 provides further advantages. Herein, the tool may be provided with at least one or more needles 14 comprising pairs of needles, as described above. The tool may comprise, for instance, between one and ten pairs of needles.

[0131] Each pair of needles may have two radial arms having a different length. The first radial arm 120 may be relatively long, extending towards the center of the ring 50. The second radial arm 122 may be shorter than the first arm 112. Each pair of needles may have radial arms of different length than another pair of needles. I.e. each needle pair may be different than each other needle pair. Each radial arm has a first end close to the ring 50, and a second end extending towards the center of the ring. The second end is provided with a section extending vertically, for distributing the coffee. All combined, the vertical sections of all needle pairs combined cover a variety of radii within the ring 50. Figures 10 to 12 exemplify use of the tool 10, provided with a number of needle pairs 14. Figure 10 shows an intermediate position. The intermediate position is typically also the starting position.

[0132] As shows in Figure 11, upon counterclockwise movement of the ring 50, the pairs of needles 14 will rotate along their respective couplings, typically until the threshold as set by the maximum range of motion of the coupling.

[0133] As shown in Figure 12, upon clockwise movement of the ring 50, the pairs of needles 14 will rotate along their respective couplings in the opposite direction, typically until the opposite threshold as set by the maximum range of motion of the coupling.

[0134] When the ring 50 is rotated, the vertical section of the shorter radial arm 122 will rotate faster than the vertical section of the longer arm 120, and therefore also experience more friction when moving through the coffee. This will cause the pair of needles to rotate with respect to its respective coupling 110, within the range of motion as allowed by the coupling. Due to the movement of the pair of needles, both radial arms will also move. Herein, the longer arm, which may potentially have its vertical section close to, or at, the middle of the ring 50, will start to move in translational direction, towards or away from the middle. See Figures 11 A and 11 B. By changing the direction of rotation, the effect is reversed and the needle ends move the other way. See Figures 12A and 12B. Thus, by rotating the tool and by changing the direction of rotation, the one or more vertical needle sections at or near the center of the ring will start to translate and cross the center of the coffee puck.

[0135] In an embodiment, the needles comprise needle pairs, each comprising one shorter needle, which will rotate more in the outer circle, and the other being longer, which will rotate closer to the center of the ring. Upon rotating the needle pairs, the shorter, outer needles have more speed and also feel more resistance from the coffee. This causes the needle set to move, including the needle in the center. If you then change the direction of rotation, the needles cut through the center.

[0136] The tool 10 may be provided with a drive system as described in the embodiments hereinabove. In addition and / or alternative to the drive system, the tool may comprise a hand gripping surface and / or another hand driving element, such as a structured surface or grip.

[0137] The drive system may be configured to rotate the rotatable structure in a first direction, such that the at least one stirring element 14 is moved with respect to the rotatable structure 50 towards the first end position, wherein the drive system is configured to subsequently rotate the rotatable structure in a second direction, such that the at least one stirring element is moved with respect to the rotatable structure towards the opposite second end position. The drive system may be configured to rotate a predetermined amount, e.g. distance and / or time, in the first direction when the at least one stirring element is in the first end position, and / or to rotate a predetermined amount, e.g. distance and / or time, in the second direction when the at least one stirring element is in the second end position.

[0138] In operation, the tool may change the direction of rotation one or more times. For instance, the direction is reversed multiple times. In practice, in a first step the tool may rotate, for instance, over about 90 degrees in clockwise direction. In a second step, this is followed by a second turn in counterclockwise direction, over a different radial distance than the first step, for instance about 45 degrees. The first and second step may be repeated a number of times, for instance, about two to ten times.

[0139] In a practical embodiment, each needle set has a different ratio of short and long radial arms. Thus, each vertical section of each needle set runs in a different track. This maximizes mixing of the coffee.

[0140] In a practical embodiment, the tool 10 comprises a total of six to ten pairs of needles. This ensures proper blending and de-clumping of the bed of coffee grounds. See Figures 10 to 12.

[0141] In a practical embodiment, the needles 14 may be made of a relatively inert metal composition, such as high quality spring steel. The needles may be relatively thin to allow flexibility. The needles 14 may have a diameter, for instance, in the order of 0.1 to 0.3 mm. During use, speed of rotation of the ring 50 may be in the order of a few Hz, for instance about 1 to 3 Hz.

[0142] A top end of the tool has an open structure allowing coffee grounds to pass.

[0143] Advantages of embodiments of a tool of the present disclosure can include at least one or more of the following features.

[0144] The tool provides an automatically driven coffee distribution tool. Due to the open structure of the top side of the tool, the action of distributing the coffee grounds can be integrated with the step of grinding the coffee beans. In other words, the tool enables to distribute the coffee grounds during grinding of the coffee beans.

[0145] The motor drive provides a various parameters to influence the coffee distribution, such as one or more of: a variation in speed of rotation [for instance expressed in rotations per minute], the direction of rotation [clockwise, counterclockwise, or a combination thereof], vibration of the needles caused by vibration of the motor. These parameters are not limiting, and may be used in combination. For instance, the motor may be driven using a sinusoidal power signal [the sinus influencing the amplitude of typically one of, but potentially both of current and voltage]. The fluctuation caused by the modulation of the power signal causes the motor to vibrate, and the vibration is transferred to the needles via the ring, thus also causing the needles in the coffee grounds to vibrate.

[0146] Random movement of the needles through the coffee grounds supports the level to which the distribution of the coffee can be perfected. Conventional tools typically have needles which can move along a fixed, typically circular path through the coffee. The moonraker tool has needles moving along non-circular paths, yet these paths are still predictable and fixed.

[0147] The tool of the present disclosure enables random movement of the needles through the coffee grounds, for instance due to a combination of speed of rotation, direction of rotation, and vibration of the needles, and variations therein during operation. As a result, also the distribution of the coffee grounds will be random, leading to optimal results to completely obviate channeling.

[0148] Generally referring to Figure 13 for background information relating to needle movement, the needles will change their position due to a combination of centrifugal forces, rotational velocity dependent resistance of the respective needle in the coffee grounds, and the length of each respective needle. Herein, needles which are positioned more towards the center R1 of the tool (such as at position P2) will experience lower resistance when moving through the coffee puck than needles which are position more in the vicinity of the outer wall 30 of the tool (such as at position P1). When the tool is rotated, the needle at the first position P1 will move faster than the needle at the second position P2. Regarding the length of the needles, longer needles which extend further into the bed of coffee grounds than shorter needles will bend more. In an embodiment, the tool of the present disclosure combines one or more of the features exemplified above, thus achieving randomized movement of the needles through the coffee. Figure 14 indicates examples of frictional forces Fw on respective needles 14 during operation of the tool.

[0149] In an embodiment as shown in Figs. 15A-15C, the at least one stirring element 14 comprises a non-circular cross section e.g. in the vertical sections 124’, 126’. The at least one stirring elements 14 each comprise a substantially flat cross section. The substantially 14 flat cross section is obtained by pressing the at least one stirring element. The at least one stirring elements 14 each comprises a first side defining a length of the at least one stirring element and second side defining a width of the at least one stirring element, wherein the width is smaller than the length. The first side of each stirring element 14 in this embodiment is arranged such that it forms the front side when the rotatable structure is rotated about axis R1 in a first direction, as shown in Fig. 15B, wherein each stirring element 14 is arranged in a first end position. The second side of the at least one stirring element is arranged such that it forms the front side when the rotatable structure 50 is rotated about axis R1 in a second direction as shown in Fig. 15C, wherein each stirring element 14 is arranged in a second end position. The width of each stirring element 14 is less than 1 mm, for example less than 0,5 mm. The length is less than 3 mm, for example less than 1,5 mm. The length may for is at least two times the width, for example 3 times the width. In use, the rotatable structure is rotated in a first direction, wherein the at least one stirring element is moved through the coffee grounds with the first surface as front side as in Fig. 15B, e.g. to provide a course homogenization, for example smoothening, distribution, decluttering and / or deblumbling. Subsequently, the rotatable structure is rotated in an opposite second direction as in Fig. 15C, wherein the at least one stirring element is moved through the coffee grounds with the second surface as front side, e.g. to provide a fine homogenization, for example smoothening, distribution, decluttering and / or deblumbling.

[0150] In an embodiment, the tool may be provided with additional sensors. For instance, a sensor may be provided to obtain information with respect to the coffee. For instance, an amount of coffee [for instance expressed in grams] can be provided. If there if more coffee in the filter, the needles will have more friction and resistance, which can be measured and used to calculate the amount of coffee in the filter.

[0151] The scope of the present disclosure is not limited to the embodiments described above. Many modifications therein are conceivable without deviating from the scope of the present invention as defined by the appended claims. In particular, combinations of features of respective embodiments or aspects of the disclosure can be made. An aspect of the invention may be further advantageously enhanced by adding a feature that was described in relation to another aspect of the invention. While the present invention has been illustrated and described in detail with reference to the figures, such illustration and description are illustrative or exemplary only.

[0152] In the claims, the word “comprising” does not exclude other steps or elements, and “a” or “an” does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference numerals in the claims should not be construed as limiting the scope of the present invention. CLAUSES

[0153] Additional and / or alternative embodiments of the invention may be described as follows:

[0154] E1. A tool for homogenizing coffee grounds in a filter basket, the tool comprising: a tool wall (30) for engaging a top end of the filter basket; a structure (50) rotatable with respect to the tool wall; and at least one stirring element (14) connected to the rotatable structure (50) for extending into the filter basket, wherein the at least one stirring element is connected to the structure (50) via a coupling (110) allowing movement of the respective stirring element with respect to the rotatable structure.

[0155] E2.The tool of clause E1, wherein the at least one stirring element comprises a pair of needles.

[0156] E3.The tool of clause E2, wherein each pair of needles comprises at least a first arm (112) and a second arm (114) extending on either side of the coupling (110), each arm comprising at least a radial section (120, 122) extending radially with respect to the rotatable structure.

[0157] E4.The tool of clause E3, wherein the radial section (120) of the first arm (112) has another length than the radial section (122) of the second arm (114).

[0158] E5.The tool of one of the previous clauses, wherein the coupling (110) defines a range of motion, wherein the movement of the stirring element within the range of motion is due to interaction of the respective stirring element with the coffee grounds.

[0159] E6.The tool of clause E5, wherein the range of motion is defined as an angle of rotation (a).

[0160] E7.A tool for homogenizing coffee grounds in a filter basket, the tool comprising: a tool wall (30) for engaging a top end of the filter basket; a structure (50) rotatable with respect to the tool wall; and at least one stirring element (14) connected to the rotatable structure (50) for extending into the filter basket, wherein a top end of the tool has an open structure (12) allowing coffee grounds to pass.

[0161] E8.The tool according to clause E7, comprising a lattice structure (62) connected to the rotatable structure (50), the lattice structure having one or more openings (60) for forming the open structure (12).

[0162] E9.The tool according to clause E8, wherein the at least one stirring element comprises a number of needles (14) which are connected to the lattice structure (62).

[0163] E10. The tool of one of clauses E3, E4, E8 or E9, wherein each radial section (120, 122) is provided with a vertical section (124, 126) for extending into the coffee grounds.

[0164] E11. The tool of one of the previous clauses, the at least one stirring element comprising a number of stirring elements having at least a radial section, wherein the radial sections of respective stirring elements have a different length.

[0165] E12. The tool according to one of the previous clauses, wherein the at least one stirring element comprises a curved needle (14).

[0166] E13. The tool according to the preceding clause, wherein the curved needle extends at least partially planar with respect to the rotatable structure (50) and via a curved section at least partially perpendicular with respect to the plane of the rotatable structure (50).

[0167] E14. The tool according to one of the previous clauses, comprising a drive system (40) for rotating the rotatable structure (50) with respect to the tool wall (30).

[0168] E15. The tool according to the preceding clause, wherein the drive system (40) comprises one or more of a battery (92), a motor (90), and a transmission to transmit movement of the motor to the rotatable structure (50), wherein the transmission is selected from a gear drive (52), a magnetic drive (80, 82), and a belt drive (98, 100). E16. The tool of clause E14 or E15, wherein the drive system is configured to rotate the rotatable structure with random speeds, varying speeds, varying direction, and / or to vibrate.

[0169] E17. An assembly of a portafilter (2), a filter basket (1) arranged in the portafilter for receiving coffee grounds, and a tool (10) according to one of clauses E1 to E16 engaging the filter wherein the at least one stirring element of the tool at least partially extends into the filter basket.

[0170] E18. A coffee grinder (70) provided with an assembly according to the preceding clause.

[0171] E19. A method of homogenizing coffee grounds in a filter basket, the method comprising the steps of: arranging a filter basket (1) for receiving coffee grounds in a portafilter (2), arranging a tool (10) for homogenizing coffee grounds on the filter basket, the tool comprising: a tool wall (30) for engaging a top end of the filter basket; a structure (50) rotatable with respect to the tool wall, e.g. a ring; and at least one stirring element (14) connected to the rotatable structure (50) for extending into the filter basket, moving the assembly of the portafilter, the filter basket and the tool to a docking location of a coffee grinder (70); activating the coffee grinder to provide coffee grounds; receiving the coffee grounds in the filter basket; and rotating the rotatable structure (50) of the tool to homogenize the coffee grounds in the filter basket due to movement of the at least one stirring element through the coffee grounds.

[0172] E20. The method of clause E19, wherein the at least one stirring element comprises a pair of needles connected to the rotatable structure (50) via a coupling (110), the coupling allowing a range of motion for the respective pair of needles to rotate with respect to the rotatable structure.

[0173] E21. The method of clause E19 or E20, wherein the step of rotating the rotatable structure comprises rotating the rotatable structure clockwise over a first distance, and rotating the rotatable structure counterclockwise over a second distance. E22. The method of clause E21, comprising the step of repeating the step of rotating the rotatable structure clockwise over a first distance and rotating the rotatable structure counterclockwise over a second distance a number of times.

[0174] E23. The method of one of clauses E21 or E22, wherein the first distance is different than the second distance.

[0175] E24. The method of one of clauses E19 - E23, the step of receiving the coffee grounds in the filter basket comprising passing the coffee grounds through an open structure (12) provided at a top end of the tool.

[0176] E25. The method of one of clauses E19 - E24, the tool comprising a drive system (40), and the step of rotating the rotatable structure (50) comprising using the drive system to do one of more of rotating the rotatable structure with random speeds, rotating the rotatable structure with varying speed, and / or to vibrate.

Claims

AMENDED CLAIMS received by the International Bureau on 23 April 2025 (23.04.2025)1. A tool for homogenizing coffee grounds in a filter basket, the tool comprising: a tool wall (30) for engaging a top end of the filter basket; a structure (50) rotatable with respect to the tool wall; and at least one stirring element (14) connected to the rotatable structure (50) for extending into the filter basket, wherein the at least one stirring element is connected to the structure (50) via a coupling (110) comprising a hinge, allowing movement of the respective stirring element with respect to the rotatable structure, when the stirring element is moved through the coffee grounds by rotation of the rotatable structure.

2. The tool of claim 1 , wherein the rotatable structure is rotatable about a first axis, e.g. a center axis of the rotatable structure, and wherein the at least one stirring element is rotatable with respect to the rotatable structure about a second axis offset from the first axis.

3. The tool of claim 2, wherein the first axis and the second axis are parallel and noncoaxial with respect to each other.

4. The tool of any of the preceding claims, wherein the at least one stirring element comprises a pair of needles.

5. The tool of any of the preceding claims, wherein the at least one stirring element comprises at least a first arm (112) and a second arm (114) extending on either side of the coupling (110), each arm comprising at least a radial section (120, 122) extending substantially radially with respect to the rotatable structure.

6. The tool of the preceding claim, wherein the radial section (120) of the first arm (112) has a different length than the radial section (122) of the second arm (114).

7. The tool of any of the previous claims, wherein the coupling (110) defines a range of motion, wherein the stirring element is configured to, during rotation of the rotatable structure, move within the range of motion due to interaction of the respective stirring element with the coffee grounds, for example wherein the range of motion is defined as an angle of rotation (a).AMENDED SHEET (ARTICLE 19)8. The tool of any of the preceding claims, wherein the at least one stirring element (14) has a non-circular cross section and comprises:- a first side arranged such that it forms the front side when the rotatable structure (50) is rotated in a first direction, e.g. when the at least one stirring element is arranged in a first end position with respect to the rotatable structure; and- a second side arranged with respect to the first side such that it forms the front side when the rotatable structure is rotated in a second direction, e.g. when the at least one stirring element is arranged in a second end position with respect to the rotatable structure (50).

9. The tool of any of the preceding claims, wherein a top end of the tool has an open structure (12) allowing coffee grounds to pass.

10. The tool according to any of the preceding claims, comprising a lattice structure (62) connected to the rotatable structure (50), the lattice structure having one or more openings (60) for forming the open structure (12).

11. The tool according to any of the preceding claims, wherein the at least one stirring element is connected to the lattice structure (62), e.g. and comprises at least a needle (14).

12. The tool according to any of the preceding claims, wherein the at least one stirring element comprises a radial section (120, 122) and a vertical section (124, 126) for extending into the coffee grounds.

13. The tool according to any of the preceding claims, the at least one stirring element comprising multiple of the stirring elements having at least a radial section, wherein the radial sections of respective stirring elements have a different length.

14. The tool according to any of the preceding claims, wherein the at least one stirring element comprises a curved needle (14).

15. The tool according to the preceding claim, wherein the curved needle extends at least partially planar with respect to the rotatable structure (50) and via a curved section at least partially perpendicular with respect to the plane of the rotatable structure (50).AMENDED SHEET (ARTICLE 19)16. The tool according to any of the previous claims, comprising a drive system (40) for rotating the rotatable structure (50) with respect to the tool wall (30).

17. The tool according to the preceding claim, wherein the drive system (40) comprises one or more of a battery (92), a motor (90), and a transmission to transmit movement of the motor to the rotatable structure (50), wherein the transmission is selected from a gear drive (52), a magnetic drive (80, 82), and a belt drive (98, 100).

18. The tool of claim 16 or 17, wherein the drive system is configured to rotate the rotatable structure with random speeds, varying speeds, varying direction, and / or to vibrate.

19. An assembly of a portafilter (2), a filter basket (1) arranged in the portafilter for receiving coffee grounds, and a tool (10) according to any of the preceding claims engaging the filter wherein the at least one stirring element of the tool at least partially extends into the filter basket.

20. A coffee grinder (70) provided with an assembly according to the preceding claim.

21. A method of homogenizing coffee grounds in a filter basket, the method comprising the steps of:- arranging a filter basket (1) for receiving coffee grounds in a portafilter (2),- arranging a tool (10), e.g. according to any of the claims 1-17, for homogenizing coffee grounds on the filter basket, the tool comprising: a structure (50) rotatable with respect to the filter basket; and at least one stirring element (14) rotatably connected to the rotatable structure (50) for extending into the filter basket,- rotating the rotatable structure (50) of the tool to homogenize the coffee grounds in the filter basket due to movement of the at least one stirring element with respect to the rotatable structure and through the coffee grounds.

22. The method of the preceding claim, wherein the step of rotating comprises rotating the rotatable structure about a first axis, e.g. a center axis of the rotatable structure, causing rotational movement of the at least one stirring element about a second axis offset from the first axis.AMENDED SHEET (ARTICLE 19)23. The method of claim 21 or 22, wherein the step of rotating the ring comprises rotating the rotatable structure in a first direction, e.g. clockwise, over a first distance about the first axis, and rotating the rotatable structure in an opposite second direction, e.g. counterclockwise, over a second distance about the first axis.

24. The method of the preceding claim, wherein, during the rotation of the rotatable structure in the first direction, the at least one stirring element is moved with respect to the rotatable structure, e.g. due to interaction with the coffee grounds, towards a first end position, and during rotation of the rotatable structure in the second direction, the at least one stirring element is moved with respect to the rotatable structure, e.g. due to interaction with the coffee grounds, towards a second end position opposite to the first end position.

25. The method of claim 23 or 24, comprising the step of repeating the step of rotating the ring in the first direction over a first distance and rotating the rotatable structure in the second direction over a second distance a number of times, and / or wherein the second distance is different than the second distance.

26. The method of any of claims 21 - 25, further comprising the steps of:- moving the assembly of the portafilter, the filter basket and the tool to a docking location of a coffee grinder (70); and- activating the coffee grinder to provide coffee grounds in the filter basket; wherein the step of rotating the rotatable structure is performed while the assembly is arranged in the docking location, e.g. during and / or after the step of activating the coffee grinder.

27. The method of any of claims 21 - 26, the tool comprising a drive system (40), wherein the step of rotating the rotatable structure (50) comprises activating the drive system to do one of more of rotating the rotatable structure with random speeds, rotating the rotatable structure with varying speed, rotating the rotatable structure in varying directions and / or vibrating the rotatable structure.AMENDED SHEET (ARTICLE 19)

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