A device for grinding coffee beans includes a body provided with a vertical hopper for the entry of the coffee beans and a separate vertical outlet for the ground coffee, which are mutually connected by way of a horizontal seat within which a shaft is associated axially and rotatably. A first grinder is keyed to the shaft and interacts with a facing second grinder. These grinders cooperate with elements adapted to allow a first, micro-adjustment and a second, macro-adjustment of the grinding as a function of the type of coffee beans selected.

The invention relates to a disc grinding device (2) with a stator disc (3) and a rotor disc (4) which are disposed coaxially with respect to a common disc axis and have at least approximately the same diameter, and the mutually facing sides of which correspondingly contain an annular toothed stator surface and an annular toothed rotor surface, wherein the annular toothed stator surface contains at least one stator ring region with stator teeth, which are spaced apart by stator grooves in the peripheral direction, and the annular toothed rotor surface contains at least one rotor ring region with rotor teeth, which are spaced apart by rotor grooves in the peripheral direction, wherein the toothed rotor surfaces and the toothed stator surfaces define an annular grinding gap and are disposed and formed in such a way that the grinding gap becomes narrower radially in the direction from the disc axis towards the edge of the stator disc (3) and rotor disc (4), wherein the rotor teeth and rotor grooves extend in an inclined or curved manner with respect to the radial direction of the rotor disc (4), and/or wherein at least two stator ring regions with stator teeth and/or rotor ring regions with rotor teeth lie adjacently in the radial direction of the stator disc (3) or rotor disc (4) respectively and have stator teeth or rotor teeth respectively and/or stator grooves or rotor grooves respectively of different designs, and/or wherein the stator grooves and/or rotor grooves become narrower in the direction from the disc axis towards the edge of the stator disc (3) or rotor disc (4) respectively. The invention furthermore relates to a grinder (1) comprising such a disc grinding device (2).

The invention relates to a disc grinding device (2) with a stator disc (3) and a rotor disc (4) which are disposed coaxially with respect to a common disc axis and have at least approximately the same diameter, and the mutually facing sides of which correspondingly contain an annular toothed stator surface and an annular toothed rotor surface, wherein the annular toothed stator surface contains at least one stator ring region with stator teeth, which are spaced apart by stator grooves in the peripheral direction, and the annular toothed rotor surface contains at least one rotor ring region with rotor teeth, which are spaced apart by rotor grooves in the peripheral direction, wherein the toothed rotor surfaces and the toothed stator surfaces define an annular grinding gap and are disposed and formed in such a way that the grinding gap becomes narrower radially in the direction from the disc axis towards the edge of the stator disc (3) and rotor disc (4), wherein the rotor teeth and rotor grooves extend in an inclined or curved manner with respect to the radial direction of the rotor disc (4), and/or wherein at least two stator ring regions with stator teeth and/or rotor ring regions with rotor teeth lie adjacently in the radial direction of the stator disc (3) or rotor disc (4) respectively and have stator teeth or rotor teeth respectively and/or stator grooves or rotor grooves respectively of different designs, and/or wherein the stator grooves and/or rotor grooves become narrower in the direction from the disc axis towards the edge of the stator disc (3) or rotor disc (4) respectively. The invention furthermore relates to a grinder (1) comprising such a disc grinding device (2).

A grinding device comprises a grinding housing with mutually co-acting grinding bodies. A lower of the two grinding bodies is both driven and axially adjustable for the purpose of setting a grind size. An upper grinding body is removable. A grind size of the grinding device can be adjusted in absolute manner between a first extreme position and a second extreme position, corresponding to a fixed setting range between a minimal clearance between the two grinding surfaces and a maximum clearance between the two grinding surfaces. An extreme position of the adjustable grinding body is imposed by a stop which is encountered by the adjusting means in the relevant extreme position. A coffee machine uses the absolute grind size and/or a fine-tuning for an optimal contact time between coffee and through-flowing water.

A grinding device comprises a grinding housing with mutually co-acting grinding bodies. A lower of the two grinding bodies is both driven and axially adjustable for the purpose of setting a grind size. An upper grinding body is removable. A grind size of the grinding device can be adjusted in absolute manner between a first extreme position and a second extreme position, corresponding to a fixed setting range between a minimal clearance between the two grinding surfaces and a maximum clearance between the two grinding surfaces. An extreme position of the adjustable grinding body is imposed by a stop which is encountered by the adjusting means in the relevant extreme position. A coffee machine uses the absolute grind size and/or a fine-tuning for an optimal contact time between coffee and through-flowing water.

Grinding device (1) for an automatic coffee machine, comprising: a support body (2); a lower grinder (3) and an upper grinder (4) arranged coaxially with respect to an axis (X) and delimiting a gap where the grinding is performed; a motor (21) for driving at least one of said grinders (3,4) in rotation about said axis (X); an adjustment ring nut (6) for adjusting the width of said gap having means for transforming a rotation thereof about said axis (X) into a translation of at least one of said grinders in the direction of said axis (X); and a gear for driving said ring nut (6) in rotation; where said gear comprises a toothed wheel arc (7) engaging a pinion (8), and a mechanism for fixing said toothed wheel arc (7) in an adjustable position on said ring nut (6).

Grinding device (1) for an automatic coffee machine, comprising: a support body (2); a lower grinder (3) and an upper grinder (4) arranged coaxially with respect to an axis (X) and delimiting a gap where the grinding is performed; a motor (21) for driving at least one of said grinders (3,4) in rotation about said axis (X); an adjustment ring nut (6) for adjusting the width of said gap having means for transforming a rotation thereof about said axis (X) into a translation of at least one of said grinders in the direction of said axis (X); and a gear for driving said ring nut (6) in rotation; where said gear comprises a toothed wheel arc (7) engaging a pinion (8), and a mechanism for fixing said toothed wheel arc (7) in an adjustable position on said ring nut (6).

A coffee machine including a grinder configured to grind coffee beans, and a coffee machine devised to be able to bring an air volume for separating waste such as chaff as close as possible to a target air volume. A first grinder configured to grind coffee beans; a fan configured to generate a wind pressure by rotating to separate waste from the ground beans ground by the first grinder; a fan motor configured to cause the fan to rotate; and a control unit configured to control rotation of the fan motor according to a set value, and the control unit acquires information (the number of rotation pulses) related to a rotation speed of the actually rotating fan motor, corrects the set value based on the acquired information, and controls the rotation of the fan motor according to the corrected set value.

Grinding device, coffee machine and method for adjustment thereof. A grinding device (100) comprises a grinding housing (101) with mutually co-acting grinding bodies (110, 120). A lower of the two grinding bodies (110) is both driven and axially adjustable for the purpose of setting a grind size. An upper grinding body (120) is removable. A grind size of the grinding device can be adjusted in absolute manner between a first extreme position and a second extreme position, corresponding to a fixed setting range between a minimal clearance between the two grinding surfaces and a maximum clearance between the two grinding surfaces. An extreme position of the adjustable grinding body is imposed by a stop which is encountered by the adjusting means in the relevant extreme position. A coffee machine uses the absolute grind size and/or a fine-tuning for an optimal contact time between coffee and through-flowing water.

Grinding device, coffee machine and method for adjustment thereof. A grinding device (100) comprises a grinding housing (101) with mutually co-acting grinding bodies (110, 120). A lower of the two grinding bodies (110) is both driven and axially adjustable for the purpose of setting a grind size. An upper grinding body (120) is removable. A grind size of the grinding device can be adjusted in absolute manner between a first extreme position and a second extreme position, corresponding to a fixed setting range between a minimal clearance between the two grinding surfaces and a maximum clearance between the two grinding surfaces. An extreme position of the adjustable grinding body is imposed by a stop which is encountered by the adjusting means in the relevant extreme position. A coffee machine uses the absolute grind size and/or a fine-tuning for an optimal contact time between coffee and through-flowing water.