(under subclass 164.1) Subject matter wherein the stirrer is rotatable, rotation of the stirrer generating flow of material away from the axis of rotation of the stirrer that creates the negative pressure in the mixing chamber.
(1) Note. Excluded from this subclass are devices in which all radial motion of fluid is incidental to the operation of the device, that is, not producing the suction drawing material into the mixing chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
263+, for a centrifugal pump type mixer for circulating material within a mixing chamber.
