Size reduction apparatus
OwnerTerrence J Parkeinventor
Life of this patent
Estimating the term…
Abstract
A shredding apparatus is described which comprises at least one module of a pair of counter-rotating cutting assemblies located in spaced apart parallel relationship wherein each assembly comprises a driving shaft upon which is mounted one or more cutters. The cutters are provided with a pair of cutting surfaces or edges which are located at either end of the cutter. In the one module the cutting surfaces of adjacent cutters mounted on adjacent shafts are in contact with each other over at least a part of the circumference of the cutting surfaces so that when the cutters counter-rotate, material fed between them is cut by the action of the counter rotating cutters. An anti-wrap member is associated with a driving shaft to prevent material being cut from wrapping around the shaft or cutter.
Claims27
An apparatus for reducing the size of material, comprising a pair of cutters rotatable mounted within a structure and arranged so that the cutters are each rotatable about respective spaced apart substantially parallel axes, each of said cutters having at least one substantially continuous cutting surface capable of movement circumferentially around the axes of rotation, said cutters being arranged with respect to each other to rotate simultaneously in opposite directions about their respective rotary axes with at least a part of the respective cutting surfaces of the cutters being in contact with each other, said cutting surfaces cooperating with each other to reduce the size of materials located therebetween in use as the cutters rotate simultaneously, wherein said cutting surfaces are each oppositely inclined to one another and are angularly inclined with respect to the parallel axes of rotation, and wherein there is provided at least one anti-wrap member independent of said cutter for preventing material being reduced in size by the apparatus from rotating about the axes of rotation.
A cutting assembly including at least one module of a pair of co-operating rotary cutters rotatable mounted within a structure, each of the rotary cutters being in the form of a cylindrical tube, each of the cutters forming the pair of cutters being rotatable in unison about respective spaced apart substantially parallel axes, each cutter having a substantially continuous cutting surface disposed obliquely about said respective axes of rotation around the perimeter of the cutter, wherein said pair of cutters includes a first cutter and a second cutter, and wherein the cutting surface is oppositely angularly inclined to the cutting surface of the second cutter, and wherein at least a part of each of the respective cutting surfaces cooperatively engage with each other so that in use the cutters rotate in opposite directions to cut material located between the cutting surfaces and wherein there is provided an anti-wrap member independent of said cutter for preventing rotation of the material being cut from rotating about the respective axes of rotation.
Dependencies are inferred from the claim text.