Patent ID: 7090391

Claim:
An apparatus for mixing by agitation comprising: a casing having a flow channel through which may pass a fluid; an agitation body consisting of a shaft installed in said casing and connected to a vibration source, and one or more agitation blades attached to the perimeter of the shaft, a filter being installed in said casing so as to enclose said agitation body; at least two inlets for feeding a liquid or a powder into said casing, a plurality of agitating chambers separated from other regions in said casing by divider plates in a state capable of communicating with the other regions, a filtered drain port from which a mixture filtered by said filter is drained, and an unfiltered drain port from which a mixture incapable of being filtered by said filter is drained, wherein the unfiltered drain port is connected to an open/close valve which opens when an internal pressure at the unfiltered drain port reaches to or goes beyond a predetermined value, or an open/close valve which opens at regular time interval, at least one of the plurality of agitating chambers is a pre-agitation mixing chamber to which the at least two inlets are attached, and a portion of the agitation blades are positioned in the pre-agitation mixing chamber on the agitation body and are provided in such a manner that the shape of the agitation blades and/or the agitation area of the agitation blades can be changed according to the degree of agitation desired.