A grinder includes a body having a first end, a second end defining an opening, and an interior surface defining an inner chamber extending from the opening at least partially towards the first end. The grinder also includes a chain positioned within the inner chamber. The chain includes a plurality of balls. The grinder further includes a motor coupled to the chain. The motor is configured to cause rotational or reciprocal motion of the chain within the inner chamber.

A grinder includes a body having a first end, a second end defining an opening, and an interior surface defining an inner chamber extending from the opening at least partially towards the first end. The grinder also includes a chain positioned within the inner chamber. The chain includes a plurality of balls. The grinder further includes a motor coupled to the chain. The motor is configured to cause rotational or reciprocal motion of the chain within the inner chamber.

An electric grinder is provided that includes a shell. The shell accommodates a grinding mechanism, a reducing mechanism and a power mechanism. The electric grinder also comprises a grinding chamber, where said grinding mechanism is at one end of said grinding chamber, said power mechanism and said reducing mechanism are at the other end of said grinding chamber. The grinding chamber is provided with a filling hole, and a chamber cover is provided opposite to said filling hole. The filling hole of said grinding chamber can be opened or closed by turning said chamber cover. The electric grinder is designed so that the filling hole of the grinding chamber can be easily opened or closed by turning the chamber cover. After the chamber cover rotates and closes the filling hole, the grinding chamber is sealed and no material will flow out easily, and the chamber cover will not fall off.

An electric grinder is provided that includes a shell. The shell accommodates a grinding mechanism, a reducing mechanism and a power mechanism. The electric grinder also comprises a grinding chamber, where said grinding mechanism is at one end of said grinding chamber, said power mechanism and said reducing mechanism are at the other end of said grinding chamber. The grinding chamber is provided with a filling hole, and a chamber cover is provided opposite to said filling hole. The filling hole of said grinding chamber can be opened or closed by turning said chamber cover. The electric grinder is designed so that the filling hole of the grinding chamber can be easily opened or closed by turning the chamber cover. After the chamber cover rotates and closes the filling hole, the grinding chamber is sealed and no material will flow out easily, and the chamber cover will not fall off.

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 grinding kit includes a grinding unit having a body defining an inner cavity, the body having a receiving end a depositing end. The grinding unit includes a plurality of grinding surfaces disposed within the inner cavity of the body and a drive shaft coupled to the one or more grinding surfaces. The grinding kit includes a first handle configured to removably couple to the drive shaft and configured to rotate about a first axis of rotation while coupled to the drive shaft to drive movement of the plurality of grinding surfaces. The grinding kit includes a second handle configured to removably couple to the drive shaft and configured to rotate about a second axis of rotation while coupled to the drive shaft to drive movement of the plurality of driving surfaces, the second axis of rotation being different from the first axis of rotation.

A grinding kit includes a grinding unit having a body defining an inner cavity, the body having a receiving end a depositing end. The grinding unit includes a plurality of grinding surfaces disposed within the inner cavity of the body and a drive shaft coupled to the one or more grinding surfaces. The grinding kit includes a first handle configured to removably couple to the drive shaft and configured to rotate about a first axis of rotation while coupled to the drive shaft to drive movement of the plurality of grinding surfaces. The grinding kit includes a second handle configured to removably couple to the drive shaft and configured to rotate about a second axis of rotation while coupled to the drive shaft to drive movement of the plurality of driving surfaces, the second axis of rotation being different from the first axis of rotation.

A grinding device includes: first and second grinding elements, the first grinding element being rotatable relative to the second grinding element around a rotary axis for grinding coffee beans between the grinding elements into a powder; a carrier wheel rotatable around the rotary axis for conveying powder on the carrier wheel to an outflow channel to output the powder; a housing surrounding the grinding elements and the carrier wheel and including the outflow channel, the second grinding element being stationary relative to the housing, a rolling bearing with inner and outer rings and rolling elements therebetween, the outer ring being stationary on the housing and the first grinding element, the carrier wheel and the inner ring being rotatable around the rotary axis together. An annular seal ring seals an intermediate region above the outer ring around the rotary axis between the carrier wheel and the outer ring.

A grinding device includes: first and second grinding elements, the first grinding element being rotatable relative to the second grinding element around a rotary axis for grinding coffee beans between the grinding elements into a powder; a carrier wheel rotatable around the rotary axis for conveying powder on the carrier wheel to an outflow channel to output the powder; a housing surrounding the grinding elements and the carrier wheel and including the outflow channel, the second grinding element being stationary relative to the housing, a rolling bearing with inner and outer rings and rolling elements therebetween, the outer ring being stationary on the housing and the first grinding element, the carrier wheel and the inner ring being rotatable around the rotary axis together. An annular seal ring seals an intermediate region above the outer ring around the rotary axis between the carrier wheel and the outer ring.

Coffee grinder for grinding coffee beans, comprising a container or supply element for coffee beans and a grinding device for grinding the coffee beans. The grinding device comprises a first and a second grinding element between which the coffee beans are ground, the distance between the two grinding elements in the grinding process determining the degree of grinding of the ground coffee, and at least one grinding element being driven by a motor. An adjusting element is provided, with which the distance between the two grinding elements can be adjusted by rotating an adjusting element, and a magnetic rotational position sensor, which directly or indirectly determines the absolute rotational position of this adjusting element as a measure of the distance and provides it for the further control of the coffee grinder.