Liquid purification or separation – Processes – Separating
Reexamination Certificate
2007-06-26
2007-06-26
Upton, Christopher (Department: 1724)
Liquid purification or separation
Processes
Separating
C210S803000, C210S528000
Reexamination Certificate
active
10507713
ABSTRACT:
The invention provides a flotation device including a thickening tank (1) having right cylindrical sidewalls and a downwardly sloping frusto-conical floor. A drive shaft (2) is centrally rotatably mounted within the tank. Each one of a plurality of rake arms (3) is fixedly connected to the drive shaft and extends radially outwardly, substantially parallel to the tank floor. Each arm supports an array of blades (4) extending axially into the tank. An array of baffles in the form of rectilinear baffle plates (5), fixed relative to the tank, extends axially into the tank in complementary alternate radially spaced relationship with the blades (4). The baffle plates are located within the swept volume of the blades to retard fluid rotation in response to the rotation of the rake. A diametrical service bridge (6) is fixedly connected to the tank for mounting the baffle plates.
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Communication dated Jan. 27, 2007 form Chinese Patent Office for CN 86201178.
English Translation of Chinese Communication in CN 86201178.
Extract from the Chinese Patent Office database indicating an Approved Publication Date - Dec. 24, 1986 and a Grant Publication Date - Jul. 8, 1987.
Belke Jeffrey Victor
Taylor David John Buchanan
Morgan & Finnegan , LLP
Outotec OYJ
Upton Christopher
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