US 11,998,137 B2
Cold brew coffee apparatus
Aaron J. Munsinger, Elk Mound, WI (US); Michael R. Berge, Eau Claire, WI (US); and Justun C. Seymour, Eau Claire, WI (US)
Assigned to National Presto Industries, Inc., Eau Claire, WI (US)
Filed by National Presto Industries, Inc., Eau Claire, WI (US)
Filed on Dec. 2, 2021, as Appl. No. 17/541,006.
Claims priority of provisional application 63/120,425, filed on Dec. 2, 2020.
Prior Publication US 2022/0167776 A1, Jun. 2, 2022
Int. Cl. A47J 31/20 (2006.01); A23F 3/18 (2006.01); A23F 5/26 (2006.01); A47J 31/06 (2006.01); A47J 31/44 (2006.01); B01F 33/453 (2022.01); B01F 101/14 (2022.01)
CPC A47J 31/20 (2013.01) [A23F 3/18 (2013.01); A23F 5/26 (2013.01); A47J 31/0615 (2013.01); A47J 31/0636 (2013.01); A47J 31/4403 (2013.01); B01F 33/4533 (2022.01); B01F 2101/14 (2022.01)] 7 Claims
OG exemplary drawing
 
1. A device for brewing cold brew coffee comprising:
a rotation assembly comprising a control and a rotatable magnetic assembly configured to induce a rotating magnetic field at an upper surface of the rotation assembly;
a brew chamber;
a strainer/stirrer assembly adapted to be insertable into the brew chamber, the strainer/stirrer assembly comprising:
a strainer;
an inner chamber formed by the strainer, the inner chamber having an open portion located at an upper end of the strainer;
an impeller located adjacent to a lower end of the strainer, and comprising a magnetic element that reacts to the rotating magnetic field the impeller rotatably affixed to the strainer such that the impellor rotates independently of the strainer;
the impeller comprising a plurality of vanes extending from a central axis toward an outer circumference of the impeller.