Grinding burrs for coffee bean grinders
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United States of America Patent
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Sep 14, 1993
Grant Date -
N/A
app pub date -
Jan 29, 1993
filing date -
Jan 29, 1993
priority date (Note) -
Expired
status (Latency Note)
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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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