Patent ID: 9707526
Date: 2017-07-18
CPC Classifications: B01F

Claim:
1. A stirrer, comprising; a stirrer container including a plurality of projections formed on an inner surface of the stirrer container; a plurality of grooves, each of grooves being formed between the projections; and a propeller or an impeller positioned at a lower portion of the stirrer container, wherein the plurality of projections are spirally arranged, wherein each of the plurality of projections has a semi-circular cross-sectional shape, wherein each of the plurality of projections is independently inclined with respect to a vertical plane of the container, wherein an angle between each of the plurality of projections and the vertical plane of the container is 10 to 70°, wherein a width of each of the plurality of projections is independently 0.5 to 40% of a diameter of the container, wherein a distance between the projections is independently 1 to 160% of a diameter of the container, wherein a width of the plurality of grooves is 50 to 1000% of a width of the plurality of projections, wherein a height of the projections gradually increases from a first portion adjacent to the propeller or the impeller toward a second portion opposite to the first portion, and wherein a number of the projections gradually increases or a distance between the projections gradually decreases from the first portion toward the second portion.