Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
176 words
In a rotor-stator pair for reducing and defibering a difficult material in a stock where the rotor has a plate-like base that rotates inside the stator to form an attrition interface in the form of a truncated cone between (i) a first zone defined by cutting edges on upright blades of the rotor and a second zone defined by teeth on the outer periphery of the rotor base and (ii) a plurality of alternating cutting bars and flow channels formed on an inner side wall of the stator, a mechanical system that assures attrition of all of the material in the interface by said cutting teeth acting in cooperation with the bars despite the presence of the channels and inter-tooth spacings, comprising, a first structure located on the lower inner face of said stator that deflects the flow of stock through from the first zone to the second zone and a second cooperating structure on said rotor in the spaces between the teeth to block any flow through said spaces which would by-pass the second zone.
Claim 2
Dependent Claim
176 words
In a rotor-stator pair for reducing and defibering a difficult material in a stock where the rotor has a plate-like base that rotates inside the stator to form an attrition interface in the form of a truncated cone between (i) a first zone defined by cutting edges on upright blades of the rotor and a second zone defined by teeth on the outer periphery of the rotor base and (ii) a plurality of alternating cutting bars and flow channels formed on an inner side wall of the stator, a mechanical system that assures attrition of all of the material in the interface by said cutting teeth acting in cooperation with the bars despite the presence of the channels and inter-tooth spacings, comprising, a first structure located on the lower inner face of said stator that deflects the flow of stock through from the first zone to the second zone and a second cooperating structure on said rotor in the spaces between the teeth to block any flow through said spaces which would by-pass the second zone.
Claim 3
Dependent Claim
24 words
The mechanical attrition assurance system of claim 1 wherein said first and second structures are formed integrally with the stator and the rotor, respectively.
Claim 4
Dependent Claim
27 words
The mechanical attrition assurance system of claim 2 wherein said first deflector is a planar inclined ramp closing the channels at the outer diameter of said teeth.
Claim 5
Dependent Claim
164 words
In a rotor-stator pair for reducing and defibring a difficult material in a stock where the rotor has a plate-like base that rotates inside the stator to form an attrition interface in the form of a truncated cone between (i) a first zone defined by cutting edges on upright blades of the rotor and a second zone defined by teeth on the outer periphery of the rotor base and (ii) a plurality of alternating cutting bars and flow channels formed on an inner side wall of the stator, a mechanical arrangement for increasing the useful life of the rotor-stator pair when operating with highly abrasive difficult materials, comprising, a profiled upper end of each of said upright blades at the region behind said cutting edges, said profiling comprising an increasing thinning of the area of the blade end opposite the interface with the blade height, said thinning being in the form of a wedge-recess in the trailing portion of each of said upper ends.
Claim 6
Dependent Claim
164 words
In a rotor-stator pair for reducing and defibring a difficult material in a stock where the rotor has a plate-like base that rotates inside the stator to form an attrition interface in the form of a truncated cone between (i) a first zone defined by cutting edges on upright blades of the rotor and a second zone defined by teeth on the outer periphery of the rotor base and (ii) a plurality of alternating cutting bars and flow channels formed on an inner side wall of the stator, a mechanical arrangement for increasing the useful life of the rotor-stator pair when operating with highly abrasive difficult materials, comprising, a profiled upper end of each of said upright blades at the region behind said cutting edges, said profiling comprising an increasing thinning of the area of the blade end opposite the interface with the blade height, said thinning being in the form of a wedge-recess in the trailing portion of each of said upper ends.