# US 11,305,246 B2 · Agitator device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,305,246 B2 - Document ID: US11305246B2 - Status: Granted - Kind: B2 - Application number: 16/217,641 - Filed: 2018-12-12 - Published: 2019-06-13 - Granted: 2022-04-19 - Earliest claimed: 2017-12-13 - Assignees: EKATO Rühr- und Mischtechnik GmbH - Applicants: EKATO Ruehr- und Mischtechnik GmbH - Inventors: Bernd Nienhaus; Daniel Stangier; Thorsten Grebe; Wolfgang Last; Nicole Rohn - Web page: https://patentgrep.com/patent/US11305246B2 ## CPC - B01F 27/192: with dissimilar elements - B01F 27/0723: {oblique with respect to the rotating axis} - B01F 27/0724: {directly mounted on the rotating axis} - B01F 27/0727: {having stirring elements connected to the stirrer shaft each by two or more radial rods, e.g. the shaft being interrupted between the rods, or of crankshaft type} - B01F 27/1123: sickle-shaped, i.e. curved in at least one direction - B01F 27/1125: with vanes or blades extending parallel or oblique to the stirrer axis - B01F 27/113: Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller - B01F 27/96: with openwork frames or cages - B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06) ## Abstract An agitator device, in particular a non-close-clearance agitator device, in particular with respect to a vessel wall, in particular for mixing low-viscosity to medium-viscosity media, having at least one agitation shaft and having at least one outer agitation blade which is held on the agitation shaft and which in at least one section is implemented so as to be arm-shaped. The agitator device has an inner agitation blade which conjointly with the outer agitation blade implements at least one van-type conveying unit which is at least configured for conveying a medium in at least one direction parallel with the agitation shaft and in particular in at least one further direction perpendicular to the agitation shaft. ## Claims ### Claim 1 A non-close-clearance agitator device, with respect to a vessel wall, comprising: at least one agitation shaft and having at least one outer agitation blade which is held on the agitation shaft and which in at least one section is implemented so as to be arm-shaped, at least one inner agitation blade which conjointly with the outer agitation blade implements at least one vane-type conveying unit which is at least configured for conveying a medium in at least one direction parallel with the agitation shaft and in at least one further direction perpendicular to the agitation shaft, at least one bar by way of which the outer agitation blade is connected to the agitation shaft, at least one further outer agitation blade which is implemented in a manner analogous to the outer agitation blade, wherein a normal of an inner agitation blade plane in the assembled state is aligned so as to be perpendicular to a rotation axis of the agitator device such that the inner agitation blade causes a radial flow component, and the vane-type conveying unit has at least one passage gap and wherein the outer agitation blade and the further outer agitation blade, when viewed perpendicularly to the agitation shaft and to a direction of main extent of the bar, form an X-shaped contour. ### Claim 2 (depends on 1) The agitator device according to claim 1, wherein the outer agitation blade has at least one further section which is adjacent to the section and in which the outer agitation blade is implemented so as to be wider than in the section. ### Claim 3 (depends on 1) The agitator device according to claim 1, wherein the inner agitation blade conjointly with the further section of the outer agitation blade implements the vane-type conveying unit. ### Claim 4 (depends on 1) The agitator device according to claim 1, wherein the inner agitation blade is situated at least to a large part in an inner agitation blade plane and is in particular implemented so as to be plate-type. ### Claim 5 (depends on 1) The agitator device according to claim 1, wherein the outer agitation blade is situated at least to a large part in an outer agitation blade plane. ### Claim 6 (depends on 1) The agitator device according to claim 1, wherein at least one of the at least one inner agitation blade and the at least one outer agitation blade is movable to one of a plurality of positions, and at least one extent of the passage gap is capable of being set based on a movement of the at least one of the at least one inner agitation blade and the at least one outer agitation blade to one of the plurality of positions. ### Claim 7 (depends on 1) The agitator device according to claim 1, wherein the inner agitation blade has at least one inner agitation blade normal, and the outer agitation blade has at least one outer agitation blade normal, wherein the inner agitation blade normal and the outer agitation blade normal include a minimum normal angle of more than 0° and at most 90°. ### Claim 8 (depends on 7) The agitator device according to claim 7, wherein the minimum normal angle is capable of being set. ### Claim 9 (depends on 1) The agitator device according to claim 1, wherein the inner agitation blade is capable of being fastened to the agitation shaft in various angle positions in relation to the outer agitation blade. ### Claim 10 (depends on 1) The agitator device according to claim 1, comprising at least one bottom agitation blade which, when viewed along the agitation shaft, is arranged below the outer agitation blade and/or the inner agitation blade. ### Claim 11 (depends on 10) The agitator device according to claim 10, wherein the bottom agitation blade is capable of being fastened to the agitation shaft in various angle positions in relation to the outer agitation blade. ### Claim 12 (depends on 1) The agitator device according to claim 1, wherein the outer agitation blade and the further outer agitation blade, at least when viewed perpendicularly to the agitation shaft, conjointly form a closed curved outer contour. ### Claim 13 (depends on 1) The agitator device according to claim 1, wherein the outer agitation blade and the further outer agitation blade, at least when viewed perpendicularly to the agitation shaft, conjointly form an ellipse having a non-elliptic recess. ### Claim 14 (depends on 1) An agitator with at least one agitator device according to claim 1. ### Claim 15 (depends on 14) An Agitation system having at least one container and having at least one agitator according to claim 14 arranged in the container. ### Claim 16 (depends on 1) The agitator device according to claim 1, wherein the inner agitation blade has a trapezoidal inner agitation blade outer contour, wherein a lower side of the inner agitation blade is wider than an upper side, at least when viewed perpendicularly to the agitation shaft. ### Claim 17 (depends on 1) The agitator device according to claim 1, wherein the passage gap is arranged between the outer agitation blade and the inner agitation blade and is at least in part delimited by the latter two such that the passage gap has two mutually opposite, parallel delimitations. ### Claim 18 (depends on 1) The agitator device according to claim 1, comprising at least one further bar by way of which the further outer agitation blade is connected to the agitation shaft, wherein, when viewed along the agitation shaft, the bar and the further bar point in opposite directions, such that the bar and the further bar include an angle of 180°. ### Claim 19 A non-close-clearance agitator device with respect to a vessel wall comprising: at least one agitation shaft, which in at least one operational state rotates about an agitation axis of the agitator device; and at least one outer agitation blade which is held on the agitation shaft and which in at least one section is implemented so as to be arm-shaped, a first outer agitation blade hub, a further outer agitation blade hub, a first bar and a second bar, wherein the outer agitation blade has an average width, which is a largest average expanse of the outer agitation blade perpendicular to the agitation axis, the outer agitation blade has at least one further section which is adjacent to the section and in which the outer agitation blade is implemented so as to be wider than in the section, the further section has an average width which exceeds an average width of the section by a factor of at least 2, the further section in relation to at least one operational position is arranged in a lower region of the agitator device, and the outer agitation blade in the section is connected to the first outer agitation blade hub by means of the first bar and the outer agitation blade in the further section is connected to the further outer agitation blade hub by means of the second bar.