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.

A coffee bean grinder 1 has a hopper 2 into which coffee beans are inserted. The grinding unit 3 grinds coffee beans supplied from the hopper 2. The discharge unit 4 discharges coffee beans ground by the grinding unit 3. The mounting unit 5 mounts a portafilter 6 to be closely pressed against the bottom end of the discharge unit 4. The discharge unit 4 has a guide path 41 facing vertically downward, and a tapered section 42 in which the inner diameter increases towards the bottom. A sloped section 502 of a close-fitting member 50b, attached to the bottom end portion of the tapered section 42, is closely pressed against a top surface 63a of the filter basket 63 of the portafilter 6. The tapered section 42 has a hole 44 for allowing air in the airtight space to escape, thereby allowing the coffee beans to fall.

A coffee bean grinder 1 has a hopper 2 into which coffee beans are inserted. The grinding unit 3 grinds coffee beans supplied from the hopper 2. The discharge unit 4 discharges coffee beans ground by the grinding unit 3. The mounting unit 5 mounts a portafilter 6 to be closely pressed against the bottom end of the discharge unit 4. The discharge unit 4 has a guide path 41 facing vertically downward, and a tapered section 42 in which the inner diameter increases towards the bottom. A sloped section 502 of a close-fitting member 50b, attached to the bottom end portion of the tapered section 42, is closely pressed against a top surface 63a of the filter basket 63 of the portafilter 6. The tapered section 42 has a hole 44 for allowing air in the airtight space to escape, thereby allowing the coffee beans to fall.

The invention relates to a grinder for grinding coffee beans. The grinder has a first grinding tool and a second grinding tool which form a grinding gap and are rotatable relative to each other to grind coffee beans in the gap. A force generation device is arranged for applying a force, which is adjustable during operation, to one or both of the first grinding tool and second grinding tool, which force is transferable to the coffee beans. The invention also relates to a method for grinding coffee beans with the grinder for preparing a hot beverage.

The invention relates to a grinder for grinding coffee beans. The grinder has a first grinding tool and a second grinding tool which form a grinding gap and are rotatable relative to each other to grind coffee beans in the gap. A force generation device is arranged for applying a force, which is adjustable during operation, to one or both of the first grinding tool and second grinding tool, which force is transferable to the coffee beans. The invention also relates to a method for grinding coffee beans with the grinder for preparing a hot beverage.

Disclosed herein is a pair of millstones for grinding coffee beans. The pair of millstones includes: a lower millstone configured such that a shaft hole is formed at the center thereof, a plurality of discharge grooves configured to discharge coffee beans to edges while grinding the coffee beans is formed in the top surface thereof, and an accommodation portion configured to accommodate coffee beans falling down through the discharge grooves is provided outside the discharge grooves; a shaft pin adapted to be fitted into the shaft hole of the lower millstone, and configured such that transfer paths are formed in the outer surface thereof; and an upper millstone configured such that an insertion hole is formed at the center thereof, an introduction hole configured to receive coffee beans extends upward from the insertion hole, and a grip is provided on one side thereof.

A bean grinding device and a bean grinding coffee machine including the bean grinding device the bean grinding device includes a grinding assembly and an adjusting assembly; the grinding assembly includes a bean grinding chamber, an outer grinding wheel, and an inner grinding wheel; the outer grinding wheel and the inner grinding wheel are disposed inside the bean grinding chamber; the adjusting assembly includes at least two stages of adjusting mechanisms; the at least two stages of adjusting mechanisms includes a first adjusting mechanism and a second adjusting mechanism; the first adjusting mechanism and the bean grinding chamber are connected by means of a first track; the second adjusting mechanism and the outer grinding wheel are connected by means of a second track; and positions of the first adjusting mechanism and the second adjusting mechanism are relatively fixed in an axial direction.

A bean grinding device and a bean grinding coffee machine including the bean grinding device the bean grinding device includes a grinding assembly and an adjusting assembly; the grinding assembly includes a bean grinding chamber, an outer grinding wheel, and an inner grinding wheel; the outer grinding wheel and the inner grinding wheel are disposed inside the bean grinding chamber; the adjusting assembly includes at least two stages of adjusting mechanisms; the at least two stages of adjusting mechanisms includes a first adjusting mechanism and a second adjusting mechanism; the first adjusting mechanism and the bean grinding chamber are connected by means of a first track; the second adjusting mechanism and the outer grinding wheel are connected by means of a second track; and positions of the first adjusting mechanism and the second adjusting mechanism are relatively fixed in an axial direction.

A manual mill that indicates through force feedback and free spin the completion of processing of the material inside through shearing, grating, and crumbling, without the use of teeth or protrusions, with easy grip-and-lift access to said processed material.