Mixing device for frothing beverages and method of using same

Patent metadata

Field	Value
Publication number	US-9962032-B2
Application number	US-201314390880-A
Country	US
Kind code	B2
Filing date	Mar 28, 2013
Priority date	Apr 4, 2012
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

The invention concerns a mixing device ( 1 ) having: —a whipper housing ( 2 ), a rotor ( 3 ) and a back wall ( 4 ), the whipper housing and the back wall forming a whipper chamber in which is lodged the rotor, —the whipper housing having a beverage inlet ( 11 ) and a beverage outlet ( 7 ), —a drive shaft ( 41 ) for driving the rotor, said drive shaft being supported by the back wall, —the rotor presenting a radial back surface ( 33 ) facing the whipper housing back wall ( 4 ) and a radial front surface ( 32 ) opposed to the radial back surface —the whipper housing having a front wall ( 21 ), said front wall facing at least a part of the radial front surface ( 32 ) of the rotor, and wherein the whipper housing front wall ( 21 ) presents bumps ( 5 ) elevating from the surface ( 211 ) of the front wall, the upper surface ( 51 ) of each bump being flat and the edges ( 52 ) of said upper surface being sharp.

First claim

The invention claimed is:

1. A mixing device comprising:
a whipper housing comprising a beverage inlet, a beverage outlet, and a front wall, the front wall comprises bumps elevated from a surface of the front wall, an upper surface of each bump is flat, edges of the upper surface are sharp, and the upper surface of each bump is parallel to the surface of the front wall;
a rotor;
a back wall, the whipper housing and the back wall forming a whipper chamber in which is lodged the rotor, the rotor comprising a radial back surface facing the back wall and a radial front surface opposed to the radial back surface, the radial front surface facing the front wall of the whipper housing; and
a drive shaft configured to drive the rotor, the drive shaft supported by the back wall.

2. The mixing device according to claim 1 , wherein the beverage outlet is positioned at the lowest position of the front wall of the whipper housing.

3. The mixing device according to claim 1 , wherein the bumps are regularly positioned on the front wall around a rotor central axis except in the beverage outlet.

4. The mixing device according to claim 1 , wherein all the bumps have the same shape and size.

5. The mixing device according to claim 1 , wherein each bump extends along a whole radial length of the front wall.

6. The mixing device according to claim 1 , wherein for each bump, a width is greater than a height.

7. The mixing device according to claim 1 , wherein the bumps comprise a quadrilaterally-faced hexahedra solid shape.

8. The mixing device according to claim 1 , wherein a sum of surfaces of all the bumps is between 20 and 75% of the surface of the front wall of the whipper housing.

9. The mixing device according to claim 1 , wherein the front wall comprises 3 to 11 bumps.

10. The mixing device according to claim 1 , wherein the bumps are elevated between 0.5 and 2 mm above the surface of the front wall.

11. The mixing device according to claim 1 , comprising a dissolution chamber attached to the beverage inlet of the whipper housing.

12. The mixing device according to claim 1 , wherein the rotor is a disc comprising four grooves radially extending on the radial front surface, the grooves being equally distanced one from the other.

13. The mixing device according to claim 1 , wherein the beverage outlet is positioned at the lowest point of the front wall of the whipper housing, the front wall of the whipper housing comprises seven bumps equally positioned on the surface of the front wall around the beverage outlet,
the seven bumps comprise the same cuboid shape,
the seven bumps are elevated between 0.8 and 1.3 mm above the surface of the front wall,
a sum of surfaces of the bumps represents 30 to 40% of the surface of the front wall, and
the rotor is a disc comprising four grooves radially extending on the radial front surface, the grooves being equally distanced one from the other.

14. The mixing device according to claim 1 , wherein the front wall of the whipper housing comprises a truncated cone shape tapering from a diameter of about 38 mm to about 26 mm, and the rotor has a diameter of about 25 mm.

15. A beverage dispenser comprising a mixing device comprising:
a whipper housing comprising a beverage inlet, a beverage outlet, and a front wall comprising bumps elevated from a surface of the front wall, an upper surface of each bump is flat, edges of the upper surface are sharp, and the upper surface of each bump is parallel to the surface of the front wall;
a rotor;
a back wall, the whipper housing and the back wall forming a whipper chamber in which is lodged the rotor, the rotor comprising a radial back surface facing the back wall and a radial front surface opposed to the radial back surface, the radial front surface facing the front wall of the whipper housing; and
a drive shaft configured to drive the rotor, the drive shaft being supported by the back wall.

16. A method for preparing a frothy beverage, the method comprising:
introducing a beverage ingredient and a diluent into a mixing device comprising
a whipper housing comprising a beverage inlet, a beverage outlet, and a front wall comprising bumps elevated from a surface of the front wall, an upper surface of each bump is flat, edges of the upper surface are sharp, the upper surface of each bump is parallel to the surface of the front wall,
a rotor,
a back wall, the whipper housing and the back wall forming a whipper chamber in which is lodged the rotor, the rotor comprising a radial back surface facing the back wall of the whipper housing and a radial front surface opposed to the radial back surface, the radial front surface facing the front wall of the whipper housing, and
a drive shaft configured to drive the rotor, the drive shaft being supported by the back wall; and
rotating the rotor.

17. The method according to claim 16 , wherein the beverage ingredient is a milk powder or a cocoa powder.

18. The method according to claim 16 , wherein the rotor is rotated at a speed of at least 10000 rpm.

19. A method for preparing a frothed cocoa beverage or a frothed milk beverage comprising:
introducing a cocoa or froth milk beverage ingredient into a mixing device comprising
a whipper housing comprising a beverage inlet, a beverage outlet, and a front wall comprising bumps elevated from a surface of the front wall, an upper surface of each bump is flat, edges of the upper surface are sharp, the upper surface of each bump is parallel to the surface of the front wall,
a rotor,
a back wall, the whipper housing and the back wall forming a whipper chamber in which is lodged the rotor, the rotor comprising a radial back surface facing the back wall of the whipper housing and a radial front surface opposed to the radial back surface, the radial front surface facing the front wall of the whipper housing, and
a drive shaft configured to drive the rotor, the drive shaft being supported by the back wall; and
rotating the rotor to prepare the frothed cocoa or milk beverage.

Assignees

• Nestec Sa

Inventors

• Rey Cedric
• Calderone Roberto Angelo
• Rawyler Fabien
• Candaux Patrice

Classifications

• A23L2/54

  Mixing with gases · CPC title

• A47J31/4496 Primary

  Means to produce beverage with a layer on top, e.g. of cream, foam or froth · CPC title

• A23V2002/00

  Food compositions, function of food ingredients or processes for food or foodstuffs · CPC title

• A47J31/40 Primary

  Beverage-making apparatus with dispensing means for adding a measured quantity of ingredients, e.g. coffee, water, sugar, cocoa, milk, tea · CPC title

• A47J31/401 Primary

  whereby the powder ingredients and the water are delivered to a mixing bowl · CPC title