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US 4,113,189 AGranted
Roller-colloid mill
OwnerThomas A. Sullivaninventor
Life of this patent
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OwnerThomas A. Sullivaninventor
Estimating the term…
A pressurized roller-colloid mill in which the conventional rotor and stator of a colloid mill are preceded by one or more adjustable-thrust roller bearing assemblies disposed in a series relationship. A product to be refined in the form of a slurry is pumped into the feeding port of the mill to pass between the rollers and the inner and outer raceways of one or more roller bearing assemblies, then to the gap between conventional rotor and stator elements of a colloid mill. The multiple rollers and their cooperating raceways constitute working surface areas far in excess of conventional colloid mill rotors and stators. Gang mounting of the rotor of the mill and the inner raceways of the roller bearing assemblies upon a common axially movable shaft permits gap adjustment for the enhancement of milling action. A relief valve at the outlet of the mill cooperates with the adjustable gap to provide an output of product of any desired particle size down to the low micron range.
In a colloid mill having a housing enclosing a rotor and a stator for the treatment of a slurry containing solid particles, the combination with said rotor and stator of at least a roller bearing assembly disposed in said housing, said roller bearing assembly including a generally conical inner raceway and a generally cup-shaped outer raceway and a plurality of rollers disposed between said inner raceway and said outer raceway, and means for feeding said slurry into said roller bearing assembly between said rollers and said inner and outer raceways, said slurry passing from said roller bearing assembly to said rotor and stator for completion of said treatment of said slurry and discharge from said housing.
In a colloid mill for the treatment of a slurry containing solid particles having a housing, a shaft mounted for rotation in said housing, a stator fixed in said housing, a rotor fixed to said shaft, means for rotating said shaft, means for feeding said slurry into said housing upstream of said rotor and stator and means for discharging said slurry downstream of said rotor and stator, the combination therewith of a plurality of serially disposed roller bearings, each having an inner raceway mounted in fixed position on said shaft, an outer raceway mounted in fixed position in said housing, and a plurality of rollers disposed between a cooperating set of inner and outer raceways, said slurry passing from said feeding means to a first of said roller bearings and passing between the rollers and raceways thereof thence serially between the rollers and raceways of succeeding roller bearings of said plurality and between said rotor and stator to said discharging means.
Dependencies are inferred from the claim text.