A coffee grinder has a housing that includes a ring burr, a shaft extending through the ring burr, a frustoconical burr, and an interlocking plug. An internal bore of the frustoconical burr has an upper cylindrical surface adjacent the top end, an interlocking portion adjacent the bottom edge, and a tapered side surface. The interlocking plug is shaped to extend through the internal bore of the frustoconical burr, and includes an upper cylindrical portion that fits through the upper cylindrical surface, and a lower portion that includes a sidewall surface to which is also tapered such that the sidewall surface interlocks with the side surface of the frustoconical burr.

An adjusting mechanism and a grinder using the same. The adjusting mechanism has a grinding base adjusting ring, a fixed ring, a rotating ring and a guide ring, wherein the rotating ring is movably connected with the fixed ring through threads, the guide ring is movably connected with the rotating ring through threads; and the degree of adjustment of the adjusting mechanism can be controlled by the user so that the adjustment can be finer to meet the needs of the user to a great extent, and the operation is simple and convenient.

An adjusting mechanism and a grinder using the same. The adjusting mechanism has a grinding base adjusting ring, a fixed ring, a rotating ring and a guide ring, wherein the rotating ring is movably connected with the fixed ring through threads, the guide ring is movably connected with the rotating ring through threads; and the degree of adjustment of the adjusting mechanism can be controlled by the user so that the adjustment can be finer to meet the needs of the user to a great extent, and the operation is simple and convenient.

A pepper mill includes a receiving unit, a grinding unit, and an adjusting mechanism. The receiving unit includes a stationary seat and a rotatable seat. The grinding unit includes inner and outer grinding seats. The adjusting mechanism includes an operating base mounted in the rotatable seat and operable to rotate about a rotary axis, and a movable seat disposed between the operating base and the inner grinding seat. The operating base includes a threaded rod extending upwardly into and threadedly engaging the movable seat. The movable seat is connected co-rotatably to the rotatable seat, is movable with the inner grinding seat along the rotary axis, and is not rotatable relative to the rotatable seat. Rotation of the operating base drives the movable seat to move along the rotary axis under guidance of the rotatable seat, thereby driving the inner grinding seat to move along the rotary axis.

A pepper mill includes a receiving unit, a grinding unit, and an adjusting mechanism. The receiving unit includes a stationary seat and a rotatable seat. The grinding unit includes inner and outer grinding seats. The adjusting mechanism includes an operating base mounted in the rotatable seat and operable to rotate about a rotary axis, and a movable seat disposed between the operating base and the inner grinding seat. The operating base includes a threaded rod extending upwardly into and threadedly engaging the movable seat. The movable seat is connected co-rotatably to the rotatable seat, is movable with the inner grinding seat along the rotary axis, and is not rotatable relative to the rotatable seat. Rotation of the operating base drives the movable seat to move along the rotary axis under guidance of the rotatable seat, thereby driving the inner grinding seat to move along the rotary axis.

The grinding device for grinding coffee beans comprises an interface for the user for selecting the quantity of ground coffee in a range of values of selectable quantities of ground coffee, an electric motor supplied by mains electricity voltage for driving the grinders, means for measuring the mains electricity voltage and an electronic controller configured to: associate, for each value of a selectable quantity of ground coffee, a series of grinding time values with a series of corresponding values of the mains electricity voltage; acquire a value of a quantity of ground coffee selected by the user via the interface; detect by the measuring means a value of the mains electricity voltage; for the acquired value of a quantity of ground coffee selected by the user, set the grinding time value corresponding to the detected mainly electricity voltage value; and drive the grinders for the set grinding time value.

The grinding device for grinding coffee beans comprises an interface for the user for selecting the quantity of ground coffee in a range of values of selectable quantities of ground coffee, an electric motor supplied by mains electricity voltage for driving the grinders, means for measuring the mains electricity voltage and an electronic controller configured to: associate, for each value of a selectable quantity of ground coffee, a series of grinding time values with a series of corresponding values of the mains electricity voltage; acquire a value of a quantity of ground coffee selected by the user via the interface; detect by the measuring means a value of the mains electricity voltage; for the acquired value of a quantity of ground coffee selected by the user, set the grinding time value corresponding to the detected mainly electricity voltage value; and drive the grinders for the set grinding time value.

A foodstuff grinding device is a portable grinding apparatus for coffee beans, herbs, spices, marijuana, and the like. The device takes a form of a cylindrical shape. The bottom portion of the device includes a rechargeable battery that operates an internal electric motor via a control switch. The upper portion of the invention includes a compartment with lid that holds the material to be ground. The bottom of this compartment is provided with multi-blade grinding mechanism that is operated by the motor. In the instance where coffee beans are ground, the top of the unit mates with a Keurig? K-cup reusable coffee filters to allow for easy refilling of such devices. It is also provided with a clip to attach to the side of most Keurig? models.

A foodstuff grinding device is a portable grinding apparatus for coffee beans, herbs, spices, marijuana, and the like. The device takes a form of a cylindrical shape. The bottom portion of the device includes a rechargeable battery that operates an internal electric motor via a control switch. The upper portion of the invention includes a compartment with lid that holds the material to be ground. The bottom of this compartment is provided with multi-blade grinding mechanism that is operated by the motor. In the instance where coffee beans are ground, the top of the unit mates with a Keurig? K-cup reusable coffee filters to allow for easy refilling of such devices. It is also provided with a clip to attach to the side of most Keurig? models.