US Patent 7267478 Blender container with off center blade assembly

A container (15) for a blender (10) includes a bottom surface (16) having a non-symmetrically shaped perimeter. A side wall (17) extends upwardly from the perimeter of the bottom surface (16). A mixing blade assembly (20) having a plurality of blades (21) is located above the bottom surface (16) and is rotatable on an axis which is displaced from the center of the bottom surface (10). Nonuniform spaces (25, 26) are thus created between the ends of the blades (21) and the side wall (17). The bottom surface (16) is inclined at an angle relative to the plane normal to the axis of rotation of the blade assembly (20), and it, as well as the side wall (17), may be provided with a plurality of spaced vanes (31, 32).