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US 5,205,499 AGranted
Planetary grinding apparatus
OwnerRodger L. Gamblininventor
Life of this patent
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OwnerRodger L. Gamblininventor
Estimating the term…
A planetary mill adapted for the continuous grinding of granulated material into fine powder is disclosed. A grinding chamber is provided that is continuously orbited in a planetary motion. As the tube undergoes its planetary motion it is caused to undergo a rotation about its own axis at the same rate and in an opposite sense to the planetary rotation. As a result the grinding chamber has no net rotation with respect to an external observer and can be connected to any number of external connections without the use of rotating seals provided the drive for the planetary rotation is external to the locus of points encompassed by the path of the connections as the system rotates. The ratio of the orbit radius of the planetary motion is 2.15 times that of the cylindrical tube so as to cause a cascade angle of about 45 degrees of mill mix and media in the orbiting tube which angle is independent of the rotation rate of the mill at reasonable speeds.
A planetary grinding mill comprising a base, a rotatable drum assembly supported on said base for rotation about an axis, said drum assembly including a cylindrical grinding tube having an axis parallel to and offset from said axis of said rotatable drum assembly, said cylindrical grinding tube mounted in said drum assembly for rotation relative to said rotatable drum assembly, means for limiting rotation of said cylindrical grinding tube with respect to said base while said drum assembly is being rotated, and driving means supported by said base and drivingly interconnected with said rotatable drum assembly to rotate the latter.
A planetary grinding mill comprising a base, a rotatable drum assembly supported on said base for rotation about a horizontal axis, rotatable bearing rings with an axes parallel to and offset from said rotating drums horizontal axis, with said rotatable bearing rings mounted in line in said rotatable drum assembly, a flexible grinding tube threaded through said bearing rings and extending substantially beyond at least one end of said rotatable drum assembly which flexible grinding tube is fixedly connected to at least one fixed external connector and which flexible grinding tube is rigid against twisting so as to prevent substantial twisting of said flexible grinding tube about its own axis.
Dependencies are inferred from the claim text.