The present invention is a mixing device and a method of mixing viscous fluids with a mixing device. The mixing device includes a shaft and a first and second supports mounted for rotation with the shaft. A plurality of vanes extend from each support, the vanes defining open ends of the mixer into which fluid is drawn, and openings between the vanes through which fluid is expelled. In use, the mixing device is located in a viscous fluid and the shaft is rotated, thereby effecting rotation of the vanes, causing fluid to move through the vanes and mix the fluid.
1. A mixing structure for use in mixing fluid comprising:
a shaft extending along an axis;
a first support mounted to said shaft for rotation therewith, said first support having a top side and a bottom side, a number of first vanes mounted for rotation with said first support and extending outwardly from said top side of said first support, said first vanes having an inner edge and an outer edge, said first vanes having a first end and a second end, said first vanes spaced apart from one another and defining openings there between through which fluid may flow, said first ends of said first vanes connected to said first support and said first vanes at said second ends thereof defining a first open end of said mixing structure; and
a second support selectively connected to said first support, said second support having a top side and a bottom side, said top side of said second support positioned adjacent to said bottom side of said first support when said second support is connected to said first support, a number of second vanes mounted for rotation with said second support and extending outwardly from said bottom side of said second support in generally an opposing direction from said first support and said first vanes, said second vanes having an inner edge and an outer edge, said second vanes having a first end and a second end, said second vanes spaced apart from one another and defining openings there between through which fluid may flow, said first ends of said second vanes connected to said second support and said second vanes at said second ends thereof defining a second open end of said mixing structure.
2. The mixing structure in accordance with claim 1 including means for selectively connecting said first and second supports.
3. The mixing structure in accordance with claim 1 including at least one pin extending outwardly from said top side of said second support and at least one mating opening provided in said first support for accepting each of said pins.
4. The mixing structure in accordance with claim 1 wherein at least two of said first vanes and at least two of said second vanes are spaced no more than about 0.3 inches apart at one or more portions thereof.
5. The mixing structure in accordance with claim 1 wherein said first and second vanes are curved between their inner and outer edges.
6. The mixing structure in accordance with claim 1 wherein a first portion of each of said first vanes at said first ends thereof is positioned closer to said axis than a second portion of said first vanes at said second ends thereof, and wherein a first portion of each of said second vanes at said first ends thereof is positioned closer to said axis than a second portion of said second vanes at said second ends thereof.
7. The mixing structure in accordance with claim 1 wherein said first and second supports are each plate-like in configuration.
8. The mixing structure in accordance with claim 1 wherein said first and second vanes are substantially longer between their first and second ends than they are wide between their inner and outer edge.