Solid material comminution or disintegration – Apparatus – Cooperating comminuting surfaces
Patent
1993-01-29
1993-09-14
Rosenbaum, Mark
Solid material comminution or disintegration
Apparatus
Cooperating comminuting surfaces
241296, 241297, B02C 712
Patent
active
052441598
ABSTRACT:
Grinding burrs for use in a coffee bean grinder comprises a stationary disk and a rotary disk. Each of the disks has a multiplicity of teeth arranged in stages about the center of the disk. One of the disks has its multiplicity of teeth adapted to nest among and be spaced predetermined distances from the multiplicity of teeth of the other disk. Each disk includes a first stage of teeth comprising at least four teeth equally spaced apart in a circular row about the center of the disk a distance at least greater than the average diameter of coffee beans to be ground. The burr disks also include a second stage of teeth aligned in at least one circular row and spaced outwardly from the first stage of teeth and a third stage of teeth aligned in at least one circular row about the center and spaced outwardly from the second stage. Each tooth of the various stages has a triangularly shaped leading surface forming a first apex, a triangularly shaped trailing surface forming a second apex, and a pair of lateral surfaces converging to form a line of intersection between the apices. The leading surface of each tooth has a slope angle of between about 15.degree. and 30.degree. to the vertical of said disk while the trailing surface is at a slope angle of between about 40.degree. to 60.degree. to the vertical of the disk.
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Grindmaster Corporation
Husar John M.
Rosenbaum Mark
Smith Vance A.
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