A grinder for a plant substance includes a first grinding section having a first surface and a second grinding section having a second surface and a sidewall extending from the second surface. An edge of the sidewall of the second grinding section is configured to abut the first grinding section to form a gap that separates the first surface and the second surface from one another, and at least one of the first surface or the second surface includes bumps that extend into, but not across, the gap formed by abutment of the edge of the sidewall of the second grinding section against the first grinding section to encourage rolling friction between the plant substance and the bumps to grind the plant substance. At least a portion of one of the first grinding section or the second grinding section is composed of a silicone material.

A grinder for a plant substance includes a first grinding section having a first surface and a second grinding section having a second surface and a sidewall extending from the second surface. An edge of the sidewall of the second grinding section is configured to abut the first grinding section to form a gap that separates the first surface and the second surface from one another, and at least one of the first surface or the second surface includes bumps that extend into, but not across, the gap formed by abutment of the edge of the sidewall of the second grinding section against the first grinding section to encourage rolling friction between the plant substance and the bumps to grind the plant substance. At least a portion of one of the first grinding section or the second grinding section is composed of a silicone material.

A grinder for grinding coffee beans has a first grinding disk carrier having a first grinding disk; a second grinding disk carrier having a second grinding disk; and a drive unit, by means of which at least one of the two grinding disks is rotatably operated. At least the grinding disk of the two grinding disks that is rotatably operated by means of the drive unit is directly or indirectly coupled to the drive unit by means of a central interlocking connection, the central interlocking connection being in the form of a continuous shaft-hub connection for direct torque transfer from the drive unit directly or indirectly to the grinding disk.

A grinder for grinding coffee beans has a first grinding disk carrier having a first grinding disk; a second grinding disk carrier having a second grinding disk; and a drive unit, by means of which at least one of the two grinding disks is rotatably operated. At least the grinding disk of the two grinding disks that is rotatably operated by means of the drive unit is directly or indirectly coupled to the drive unit by means of a central interlocking connection, the central interlocking connection being in the form of a continuous shaft-hub connection for direct torque transfer from the drive unit directly or indirectly to the grinding disk.

Disclosed is a coffee grinder having improved accuracy of burr alignment for grinding uniformity. The coffee grinder having improved accuracy of burr alignment for grinding uniformity of the present disclosure comprises: a lower flat burr carrier having a rotary base part rotatably coupled to a grinder body and a lower flat burr part coupled to the rotary base part so as to rotate together with the rotary base part and having a first grinding blade; and an upper flat burr carrier that is coupled to a fixed coupling part provided on the grinder body and grinds introduced coffee beans together with the first grinding blade, wherein the lower flat burr part is coupled to the side of the rotary base part.

Disclosed is a coffee grinder having improved accuracy of burr alignment for grinding uniformity. The coffee grinder having improved accuracy of burr alignment for grinding uniformity of the present disclosure comprises: a lower flat burr carrier having a rotary base part rotatably coupled to a grinder body and a lower flat burr part coupled to the rotary base part so as to rotate together with the rotary base part and having a first grinding blade; and an upper flat burr carrier that is coupled to a fixed coupling part provided on the grinder body and grinds introduced coffee beans together with the first grinding blade, wherein the lower flat burr part is coupled to the side of the rotary base part.

A coffee grinder-doser including a grinder-doser body, an electric motor, at least one driven grinder operatively connected to the electric motor, at least one fixed grinder, operatively separate from the electric motor, the driven and fixed grinders having respective teeth mutually facing and spaced from each other with respect to an adjustment direction X-X, where at least one out of the driven and fixed grinders is movable with respect to the other along the adjustment direction X-X, where the grinder-doser includes an automatic actuator operatively connected by transmission means to the driven grinder and/or fixed grinder so as to adjust and modify the mutual distance between the teeth thereof along the adjustment direction X-X.

A coffee grinder-doser including a grinder-doser body, an electric motor, at least one driven grinder operatively connected to the electric motor, at least one fixed grinder, operatively separate from the electric motor, the driven and fixed grinders having respective teeth mutually facing and spaced from each other with respect to an adjustment direction X-X, where at least one out of the driven and fixed grinders is movable with respect to the other along the adjustment direction X-X, where the grinder-doser includes an automatic actuator operatively connected by transmission means to the driven grinder and/or fixed grinder so as to adjust and modify the mutual distance between the teeth thereof along the adjustment direction X-X.

A grinder for grinding coffee beans having a first grinding tool and a second grinding tool forming a grinding nip, and the second grinding tool being rotatable relative to the first grinding tool. The grinder has at least one force generation device for applying a selectable force F to a first grinding tool or a second grinding tool, which force can be transmitted to the coffee beans. A coffee machine having such a grinder and a method for preparing coffee using said type of coffee machine and said type of grinder.

A grinder for grinding coffee beans having a first grinding tool and a second grinding tool forming a grinding nip, and the second grinding tool being rotatable relative to the first grinding tool. The grinder has at least one force generation device for applying a selectable force F to a first grinding tool or a second grinding tool, which force can be transmitted to the coffee beans. A coffee machine having such a grinder and a method for preparing coffee using said type of coffee machine and said type of grinder.