A bone grinder may have a grinding chamber, an intermediate zone, and a primary cutting element and a secondary cutting element. The intermediate zone may have a first wall and a second wall within the grinding chamber, and the intermediate zone may separate the primary cutting element from the secondary cutting element. The first wall and the second wall may slope inward such that a distance between the first wall and the second wall generally decreases from the primary cutting element to the secondary cutting element. The primary cutting element and the secondary cutting element may be positioned within the grinding chamber to sequentially perform primary cutting operations and secondary cutting operations on a bone. A drive mechanism may operatively engage the primary cutting element and the secondary cutting element.

A shredder for minimizing aggregation of whole batteries can include a shaft defining a longitudinal axis and a latitudinal axis. The shredder can include a plurality of teeth disposed on knives which fit on said shaft at an angle to the latitudinal axis selected from 0 degrees and 45 degrees. The teeth can have a first proximal end integrally molded to the shaft and a second free distal end.

A shredder for minimizing aggregation of whole batteries can include a shaft defining a longitudinal axis and a latitudinal axis. The shredder can include a plurality of teeth disposed on knives which fit on said shaft at an angle to the latitudinal axis selected from 0 degrees and 45 degrees. The teeth can have a first proximal end integrally molded to the shaft and a second free distal end.

A container when assembled includes a body, a cover, a lower grinding component, and an upper grinding component. The body includes a primary storage area compartment, the lower grinding component includes a grinding area compartment, and the upper grinding component includes a secondary storage area compartment. The upper grinding component partially nests within the lower grinding component. The lower grinding component defines a recess that includes the grinding area compartment. The upper grinding component is inserted into and partially received within the recess of the lower grinding component to form a grinder. The lower grinding component partially nests within the body of the container and the cover fits over the upper grinding component and partially over the lower grinding component when the cover is secured to the body of the grinder, whereby the grinder is completely enclosed within the body and cover of the container.

A container when assembled includes a body, a cover, a lower grinding component, and an upper grinding component. The body includes a primary storage area compartment, the lower grinding component includes a grinding area compartment, and the upper grinding component includes a secondary storage area compartment. The upper grinding component partially nests within the lower grinding component. The lower grinding component defines a recess that includes the grinding area compartment. The upper grinding component is inserted into and partially received within the recess of the lower grinding component to form a grinder. The lower grinding component partially nests within the body of the container and the cover fits over the upper grinding component and partially over the lower grinding component when the cover is secured to the body of the grinder, whereby the grinder is completely enclosed within the body and cover of the container.

The invention relates to an apparatus for the pretreatment and subsequent conveying or plastification of plastics, with a container with a mixing and/or comminution implement that is rotatable around an axis of rotation, wherein, in a side wall, an aperture is formed, through which the plastics material can be removed, a multiscrew conveyor being provided, with at least two screws rotating in a housing, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, where, on the outflow side, there is an offset distance between the longitudinal axis of the screw closest to the container, on the outflow side, and the radius that is parallel to the longitudinal axis, and in that the screws co-rotate.

Machines and methods adapted to process, for example, to reduce the size of, disperse, or homogenize, a variety of materials and compositions. Such methods and machines are capable of reducing the size of a material and dispersing the material in a liquid by cutting the material with knives located along a perimeter of an annular-shaped cutting head, causing the cut material to flow radially outward from the cutting head through gaps between the knives, and flowing a liquid through passages in the cutting head that cause the liquid to cascade around the knives of the cutting head in an axial direction of the cutting head.

Machines and methods adapted to process, for example, to reduce the size of, disperse, or homogenize, a variety of materials and compositions. Such methods and machines are capable of reducing the size of a material and dispersing the material in a liquid by cutting the material with knives located along a perimeter of an annular-shaped cutting head, causing the cut material to flow radially outward from the cutting head through gaps between the knives, and flowing a liquid through passages in the cutting head that cause the liquid to cascade around the knives of the cutting head in an axial direction of the cutting head.

The present invention relates to a shaft coupling device (10) and to a comminuting device having such a shaft coupling device (10). The shaft coupling device (10) has a first shaft hub (11) of a first shaft, the first shaft hub (11) having a plurality of first receiving units, a second shaft hub (14) of a second shaft, the second shaft hub (14) having a plurality of second receiving units, and a plurality of connection elements (12) for connecting the first shaft hub (11) to the second shaft hub (14). The plurality of first receiving units are arranged at a distance from each other along the circumference of the first shaft hub (11), and the plurality of second receiving units are arranged at a distance from each other along the circumference of the second shaft hub (14). The connection elements (12) are secured preferably in the recesses of the first shaft hub (11) by means of screws (13).

The present invention relates to a shaft coupling device (10) and to a comminuting device having such a shaft coupling device (10). The shaft coupling device (10) has a first shaft hub (11) of a first shaft, the first shaft hub (11) having a plurality of first receiving units, a second shaft hub (14) of a second shaft, the second shaft hub (14) having a plurality of second receiving units, and a plurality of connection elements (12) for connecting the first shaft hub (11) to the second shaft hub (14). The plurality of first receiving units are arranged at a distance from each other along the circumference of the first shaft hub (11), and the plurality of second receiving units are arranged at a distance from each other along the circumference of the second shaft hub (14). The connection elements (12) are secured preferably in the recesses of the first shaft hub (11) by means of screws (13).