# US 10,478,791 B2 · Stirring device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,478,791 B2
- Document ID: US10478791B2
- Status: Granted
- Kind: B2
- Application number: 15/738,713
- Filed: 2016-06-30
- Published: 2018-06-28
- Granted: 2019-11-19
- Earliest claimed: 2015-07-01
- Assignees: Sumitomo Heavy Industries Process Equipment Co., Ltd.; Izumi Food Machinery Co., Ltd.
- Applicants: Sumitomo Heavy Industries Process Equipment Co., Ltd.; IZUMI FOOD MACHINERY Co., Ltd.
- Inventors: Shoji Morinaga; Katsuhide Takenaka; Keiji Esaki; Tetsuya Miyata; Soushi Murakami; Daisuke Sugifune
- Web page: https://patentgrep.com/patent/US10478791B2

## CPC

- B01F 27/91: with propellers
- B01F 23/40: Mixing liquids with liquids; Emulsifying
- B01F 23/41: Emulsifying
- B01F 23/43: using driven stirrers
- B01F 23/47: involving high-viscosity liquids, e.g. asphalt
- B01F 27/113: Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller
- B01F 27/11451: {forming open frameworks or cages}
- B01F 27/17: Stirrers with additional elements mounted on the stirrer, for purposes other than mixing
- B01F 27/84: with two or more stirrers rotating at different speeds or in opposite directions about the same axis
- B01F 35/92: for heating the outside of the receptacle, e.g. heated jackets or burners
- B01F 2035/98: {Cooling}
- B01F 2035/99: {Heating}
- B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06)

## Abstract

Provided is a stirring device including: a stirred tank, of which an inner peripheral wall has a circular shape in cross section; and at least one flow impeller and at least one shearing impeller that are located inside the stirred tank and configured to be rotatable independently of each other, in which rotational centers of the flow impeller and the shearing impeller are coaxially provided, the flow impeller rotates around a vertical axis along the inner peripheral wall of the stirred tank to form at least a flow directed toward a lower side in the stirring object existing in the stirred tank, and the shearing impeller imparts a shearing force to the stirring object and is provided on a radially inward side of the flow impeller in the stirred tank and at a position contacting the flow of the stirring object formed by the flow impeller.

## Claims

### Claim 1

A stirring device configured to stir a material having fluidity to obtain a stirred object material, comprising:
a stirred tank, of which an inner peripheral wall has a circular shape in cross section, and at least one flow impeller and at least one shearing impeller that are located inside the stirred tank and configured to be rotatable independently of each other,
wherein rotational centers of the flow impeller and the shearing impeller are coaxially provided,
the flow impeller is provided along the inner peripheral wall of the stirred tank and comprises a flow impeller body having a band shape configured to rotate around a vertical axis to form at least a flow directed toward a lower side in the material existing in the stirred tank,
the shearing impeller comprises a rotatable circular disk part and a plurality of shearing teeth provided at intervals in a circumferential direction of the circular disk part,
each of the plurality of shearing teeth is configured to collide with the material by rotation of the shearing impeller to impart a shearing force to the material,
the shearing force breaks droplets of the material for segmentalization when the stirring device is used for emulsification, and
the shearing impeller is provided in one stage or a plurality of shearing impellers are provided in multiple stages in a vertical direction of the stirred tank at a lower part of the stirred tank, and the shearing impeller or the plurality of shearing impellers are provided on a radially inward side of the flow impeller in the stirred tank and on a position contacting the flow formed by the flow impeller.

### Claim 2 (depends on 1)

The stirring device according to claim 1, wherein the stirred tank comprises a straight trunk part having a cylindrical shape, and a restricting part that is continued to a lower side of the straight trunk part and has an inner diameter decreasing toward the lower side, and
the shearing impeller is arranged with a distance of 10 to 30% in a ratio relative to an inner diameter of the straight trunk part from a bottom part of the stirred tank.

### Claim 3 (depends on 1)

The stirring device according to claim 1, wherein ribbon blades are used for the flow impeller and dispersion blades are used for the shearing impeller.

### Claim 4 (depends on 1)

The stirring device according to claim 1, further comprising an inner impeller located on an inner side of the flow impeller in the stirred tank, wherein a rotational center of the inner impeller is provided coaxially with rotational centers of the flow impeller and the shearing impeller.

### Claim 5 (depends on 1)

The stirring device according to claim 1, wherein the flow impeller comprises upper blades that are located on an upper side, and lower blades that are continued from the upper blades on a lower side of the upper blades.

### Claim 6 (depends on 1)

The stirring device according to claim 1, further comprising a heating and cooling part that is able to heat or cool the material existing in the stirred tank through the inner peripheral wall of the stirred tank.

### Claim 7 (depends on 6)

The stirring device according to claim 6, further comprising a scraper that rotates along with the flow impeller, and rotates, while moving the material located near the inner peripheral wall of the stirred tank.