Patent ID: 7887230
Filing Date: 2011-02-15
Classification: B01F

Abstract:
1. A mixer configured for attachment to a power tool for mixing a viscous material, comprising: a shaft having a first end and defining a shaft axis; a plurality of paddles attached to said shaft and extending radially from said shaft, all said paddles have generally the same axial distance to said first end of said shaft, said paddles configured for rotation about said shaft axis in a direction of rotation; an outside surface of each paddle opposite said shaft, wherein said outside surface has a convex extension portion that runs less than a full length of said paddle, and said convex extension portion forms an outermost radial extent of the mixer; each of said paddles having a general radiused “S”-shape defined between a top end and a bottom end of said paddle, and between a leading surface and a trailing surface of said paddle; and a support arm extending radially from said shaft to each of said paddles, said support arm forming a “T”-shape with each of said paddles, where said support arm forms a leg of said “T”-shape, and each of said paddles forms two arms of said “T”-shape; wherein said convex extension portion is in the same plane as the “T”-shape, and wherein an edge of said “S”-shape is in a plane 90-degrees from said “T”-shape.