Patent ID: 7316502
Filing Date: 2008-01-08
Classification: B01F

Abstract:
1. A blade for mixing a material, comprising: a disk comprising a plastic or composite material, said disk having a substantially flat top surface and a substantially flat bottom surface, a center opening for mounting the disk on a rotatable shaft, and a plurality of circumferentially-spaced openings extending through the disk from the substantially flat top surface to the substantially flat bottom surface, wherein each opening has two sides which extend from said top surface to said bottom surface, each of said two sides being angled with respect to an axis perpendicular to the substantially flat top surface of the disk, said angling of each of said sides extending from said top surface to said bottom surface, at least one of said sides having two differently angled sections, and said circumferentially-spaced openings being spaced inwardly away from the outer periphery of the disk, wherein material which is being mixed by the blade is drawn downwardly through the circumferentially-spaced openings.