Back to results
US 2006/0219826 A1Published application
Shredder for reduced shred size and method of construction thereof
AssigneeShred-Tech Corporation
InventorDavid Yamamoto
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeShred-Tech Corporation
InventorDavid Yamamoto
Estimating the term…
This invention relates to a shredder and method of reducing shred size of shredded material by arranging knives on each shaft so that each set of knives has a high number of unique hook positions around a circumference of the set and controlling the locations and numbers of hooks to maintain a low torque load. The knives at the ends of each set have a larger diameter than the remaining knives. Shred sizes can be reduced to approximately half the size of previous shredders with no increase in torque load. A bulkhead wall and spacer assembly is adjustable with recessed portions to block off substantially all of a void that would otherwise exist at the end of each shredder body. A fingerplate assembly is also provided.
A method of reducing shred size of shredded material using a shredder with at least two rotatable shafts and at least two sets of parallel interactive knives having the form of circular plates, one set of knives being located in a spaced relationship on each shaft, said shafts having drive means to rotate said shafts, said knives of each set rotating with each shaft, with a shredder body surrounding said at least two sets, said knives being spaced apart from one another by substantially a knife width so that alternating knives of one set fit between alternating knives of the other set with the peripheries of said knives of one set overlapping the peripheries of said knives of the other set, each knife having a periphery with at least two hooks thereon, said method comprising locating said knives on each shaft so that each set has at least thirty unique hook positions around a circumference of said set with at least two hooks of the same set biting material to be shredded at each unique hook position substantially at the same time, controlling locations and numbers of hooks to maintain a low torque load on said shredder relative to a maximum torque load for the shredder while substantially producing shredded material with a small shred size of less than 2.5 inches long, operating said drive means to rotate said shaft, causing said knives of each set to interact with one another, supplying material to be shredded to an inlet of said shredder and collecting shredded material at an outlet of said shredder.
A method of reducing shred size of shredded material using a shredder with at least two rotatable shafts and at least two sets of parallel interactive knives having the form of circular plates, one set of knives being located in a spaced relationship on each shaft, said shafts having drive means to rotate said shafts, said knives of each set rotating with each shaft, with a shredder body surrounding said at least two sets, said knives being spaced apart from one another by substantially a knife width so that alternating knives of one set fit between alternating knives of the other set with the peripheries of said knives of one set overlapping the peripheries of said knives of the other set, each knife having a periphery with at least two hooks thereon, said method comprising locating said knives on each shaft so that each set has at least thirty different hook positions around a circumference with a plurality of the total hooks having a hook position in which only one hook of the same set bites material to be shredded at substantially the same time, controlling locations and numbers of hooks to maintain a torque load on said shredder while producing shredded material with a small shred size, operating said drive means to rotate said shafts, causing said knives of each set to interact with one another, supplying material to be shredded to an inlet of said shredder and collecting shredded material at an outlet of said shredder.
A shredder for producing a reduced shred size of shredded material, said shredder comprising at least two sets of parallel interactive knives in the form of circular plates and at least two shafts, one set of knives being located on each shaft, said shafts having drive means to rotate said shafts, said knives of each set rotating with each shaft, with a shredder body surrounding said at least two sets, said knives being spaced apart from one another by substantially a knife width so that alternating knives of one set fit between alternating knives of the other set with the peripheries of said knives of one set overlapping the peripheries of said knives of the other set, each knife having a periphery with at least two hooks thereon, said knives being located on each shaft so that each set of knives has at least thirty unique hook positions around a circumference of said set with at least two hooks of the same set actively biting material to be shredded at each unique hook position at substantially the same time, said shredder having drive means to rotate said at least two shafts, said hooks being located to cause said knives of each set to interact with one another to shred material provided to said shredder and to produce shredded material from said shredder of small shred size at a low torque load.
A shredder for producing shredded material, said shredder comprising at least two sets of parallel interactive knives in the form of circular plates and at least two shafts, one set of knives being located on each shaft, said shaft having drive means to rotate said shafts, said knives of each set rotating with each shaft, with a shredder body surrounding said at least two sets, said knives being spaced apart from one another by substantially a knife width so that alternating knives of one set fit between alternating knives of the other set with peripheries of said knives of one set overlapping peripheries of said knives of said other set, each knife having a periphery with hooks thereon, said shredder having a bulkhead wall located between an end of each set of knives and shredder body, said bulkhead wall having a first recessed portion that is sized and shaped to receive an outermost knife of each set, there being two bulkhead walls.
A shredder for producing shredded material, said shredder comprising at least two sets of parallel interactive knives in the form of circular plates and at least two shafts, one set of knives being located on each shaft, said shaft having drive means to rotate said shafts, said knives of each set rotating with each shaft, with a shredder body surrounding said at least two sets, said knives being spaced apart from one another by substantially a knife width so that alternating knives of one set fit between alternating knives of the other set with peripheries of said knives of one set overlapping peripheries of said knives of said other set, each knife having a periphery with hooks thereon, said shredder having a fingerplate assembly with fingers extending inward between said knives, said fingers being mounted in a spaced relationship on a base, with a barrier extending inward from said base longitudinally on said fingerplate assembly, said barrier blocking spaces between said fingers in an area near said base to prevent material to be shredded that is oriented in a vertical plane from passing through said shredder near said base without being shredded.
Dependencies are inferred from the claim text.