The present invention discloses a tobacco grinder comprising an upper cover, a rotary blade connected to the bottom of the upper cover, and a bottom cover. An upper ring and a lower ring are arranged between the upper cover and the bottom cover which are connected to the upper ring and the lower ring through threads correspondingly, and connected through threads; the upper ring is provided with a central through hole, and a multi-hole mesh is installed at the lower end opening of the upper ring; three feeding holes are formed in the top of the upper ring; a filter screen is installed at the bottom of the lower ring together with a compression ring. The tobacco grinder can make ground tobacco more uniform and contain more and larger tobacco and is convenient and fast to use and easy to clean, and certain components can be replaced conveniently.

A coffee extraction apparatus includes: a first grinder that includes a first burr configured to rotate, a first burr through-hole defined in the first burr in an axial direction of the first burr, a first burr inlet, a first burr outlet discharging coffee powder, a second burr inserted into the first burr through-hole through the first burr outlet to define a grinding space for grinding the whole beans with the first burr, and a burr coupler that supports the second burr and that couples the second burr to the first grinder. The apparatus further includes an extractor that defines an opening on a first side facing the first burr outlet to receive the coffee powder discharged through the first burr outlet and that mixes the coffee powder with water to extract coffee liquid where the burr coupler is configured to selectively separate the first grinder from the second burr.

A coffee bean grinding machine with which a taste of coffee can be enjoyed. A coffee bean grinding machine including: a grinder configured to grind coffee beans; and a control device configured to control the grinder, in which the grinder has a plurality of types of particle sizes that can be set for producing ground coffee beans, and the control device controls the production of the ground coffee beans while changing the set particle size of the grinder according to the plurality of set particle sizes.

A coffee bean grinding machine with which a taste of coffee can be enjoyed. A coffee bean grinding machine including: a grinder configured to grind coffee beans; and a control device configured to control the grinder, in which the grinder has a plurality of types of particle sizes that can be set for producing ground coffee beans, and the control device controls the production of the ground coffee beans while changing the set particle size of the grinder according to the plurality of set particle sizes.

The invention relates to a method for dispensing ground coffee for preparing a coffee beverage. The method comprises the steps of: providing a machine (110), which comprises one or more receptacles (13, 14) for storing one or different types of roasted coffee beans, one or more dosing devices (60, 70) for dispensing coffee beans, which are stored in the one or more receptacles (13, 14), and a grinder (30) for receiving coffee beans, which are dispensed by the one or more dosing devices (60, 70), the grinder (30) being configured to move into different grinding positions for different grinding degrees, respectively; setting up the grinder (30) so that the grinder (30) is in a specific grinding position; dispensing, with the one or more dosing devices (60, 70), a specific amount of coffee beans to the grinder (30) subsequent to the step of setting up the grinder (30); and grinding, with the grinder (30), said specific amount of coffee beans and, thus, dispensing the so ground coffee beans until the grinder (30) is free from coffee beans.