Chipping apparatus with eccentric chipping tools

A chipping apparatus comprising:

• a housing;
• and
• a chipping system for chipping material, the chipping system being located within the housing and rotating in a predefined direction about an axis of rotation, the chipping system further including a first chipping tool and a second chipping tool moving relative to one another during rotation thereof and thereby forming a circular chipping zone through which air flows,
• wherein the material is introduced into the housing in an axial direction, with respect to the axis of rotation, and is then supplied in a radial direction, with respect to the axis of rotation, to the first and second chipping tools, the material being drawn out of the housing as chipped material tangentially through an outlet after chipping,
• wherein the housing is defined by a first coordinate system having primary axes X1 and Y1, which intersect at right angles in a center point M1 of the housing, the primary axis Y1 being arranged substantially perpendicular to a tangential outlet direction so that the housing is divided by the primary axes X1 and Y1 into sectors I, II, III and IV in the direction of rotation, where the material outlet is arranged in sector I,
• wherein the axis of rotation of the chipping system is arranged eccentrically, with respect to the center point M1 of the housing, in the region of sectors I or II of the housing, and
• wherein the housing has a spiral-shaped cross-section, with M1 being a starting point of the spiral.

A chipping apparatus, comprising:

• a housing having a material inlet and a material outlet, and an arcuate housing wall defining a chipping chamber therein, said arcuate housing wall having a radius of curvature measured from a central axis of said housing which is substantially constant over at least one-half of a circumference of said arcuate housing walk;
• and
• a chipping tool located within said housing, said chipping tool being rotatable about an axis of rotation which is displaced from the central axis of said housing,
• wherein a radius measured from the axis of rotation of the chipping tool to the arcuate housing wall increase, from a starting point on the arcuate housing wall, over at least one-half of the circumference of said arcuate housing wall in a direction towards the material outlet, and
• wherein a radius measured from the axis of rotation of the chipping tool to the arcuate housing wall is greater at an area of the arcuate housing wall that is formed by the material outlet than at the starting point, and
• wherein the axis of rotation of said chipping tool is displaced vertically and horizontally from the central axis of said housing.