Liquid purification or separation – Processes – Separating
Reexamination Certificate
1999-04-29
2001-01-23
Reifsnyder, David A. (Department: 1723)
Liquid purification or separation
Processes
Separating
C210S791000, C210S360100, C210S372000, C210S375000, C210S380100, C210S391000, C210S394000, C210S396000, C210S402000, C494S036000, C494S037000, C494S058000
Reexamination Certificate
active
06177021
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a method and device for clearing the product from of a centrifuge basket of a discontinues centrifuge in which a scraper blade is pivoted toward the spun-off layer of product and, in this area, scrapes the product from the basket with a cutting edge, which is directed in a direction opposite to the rotation direction of the basket.
2. Description of Related Art
In a known embodiment, the clearing device includes a plow share that is pivotable about a vertical clearing rod. A scraper blade is resiliently and rotatable mounted to the plow share. The scraper blade, which extends over only a short section of the overall height of the centrifuge basket, is pressed into the layer of product (e.g., a layer of sugar) in a direction that is opposite to the rotation direction of the centrifuge basket until it comes to bear against the working sieve. The scraper blade is then moved axially downward out of its top position toward the basket base, and is then moved axially back upward, before returning to its initial position.
SUMMARY OF THE INVENTION
It is a general object of the invention to provide an improved device for removing product from the inside of a centrifuge basket.
A further object of the invention is to provide an improved process for removing product from the inside of a centrifuge basket.
It is a specific object of the invention to optimize product removal efficiency.
It is another object of the invention to reduce the time required to remove the product from the inner wall of the centrifuge basket.
It is still another object of the invention to reduce the amount of residual product that remains in the centrifuge basket upon completing the removal process.
A preferred embodiment of the inventive process which is intended to accomplish at least some of the foregoing objects includes first pivoting the scraper blade toward an inner wall of the basket, wherein the scraper blade lies in a direction opposite to a rotation direction of the basket, and wherein the scraper blade contacts the product over approximately the entire height of the wall of the basket; scraping the product from the basket wall; ceasing the pivoting of the scraper blade when the cutting edge reaches a desired position prior to touching the inner wall of the basket; and pivoting the scraper blade away from the basket wall.
A preferred embodiment of the inventive device which is intended to accomplish at least some of the foregoing objects includes a clearing rod having an axis at least generally parallel to the rotational axis of the basket; and a scraper blade, having a cutting edge, pivotally mounted on the clearing rod for pivoting about the axis of the clearing rod, wherein the cutting edge, after the scraper blade is pivoted in a direction toward the inner wall of the centrifuge basket, extends over approximately the entire height of the centrifuge basket.
Additional objects, features, and advantages of the invention will become apparent from the following description of preferred embodiments of the invention.
REFERENCES:
patent: 5252202 (1993-10-01), Hirose
patent: 5338459 (1994-08-01), Hirose
patent: 5460717 (1995-10-01), Grimwood et al.
patent: 5595655 (1997-01-01), Steiner et al.
patent: 5891347 (1999-04-01), Matsumoto
patent: 1 043 224 (1956-08-01), None
patent: 42 11 254 (1993-05-01), None
patent: 0 785 030 A2 (1997-07-01), None
patent: WO 97/15400 (1997-05-01), None
Matusch Siegfried
Winnemuth Mario
Braunschweigische Maschinenbauanstalt AG
Foley & Lardner
Reifsnyder David A.
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