Abstract: A laboratory apparatus for grinding loose materials, comprising a frame for supporting a shaft that is mounted for rotation about its own axis and is associated with a corresponding motor actuation and with supports for supporting a container that has at least one opening for introducing and withdrawing the materials and is arranged eccentrically with respect to the shaft; the container is adapted to assume at least one active configuration, in which it traces an orbit around the shaft, which is rotationally actuated, and at least one inactive configuration for introducing the materials to be ground and/or for withdrawing the ground materials.

Abstract: A mill for grinding loose materials, which comprises a closed container provided with at least one opening for introducing and removing the materials and has, at its two poles, a first coupling shaft and a second coupling shaft articulated thereto, a fixed frame which has centering elements for said first shaft and supports a driving shaft which is actuated so that it can rotate continuously, a flange which is fixed to said driving shaft and has eccentric elements for supporting said second shaft with a rotary coupling element interposed, said eccentric elements being adapted to make said second shaft perform a substantially circular orbit.