US 12,070,154 B2
Beverage preparation machine with enhanced pump control
Sergio Chioda, Lausanne (CH); Martino Ruggiero, Lonay (CH); and Benoit Denkinger, Petit-Lancy (CH)
Assigned to Societe des Produits Nestle S.A., Vevey (CH)
Appl. No. 16/615,454
Filed by SOCIETE DES PRODUITS NESTLE S.A., Vevey (CH)
PCT Filed May 18, 2018, PCT No. PCT/EP2018/063035
§ 371(c)(1), (2) Date Nov. 21, 2019,
PCT Pub. No. WO2018/215320, PCT Pub. Date Nov. 29, 2018.
Claims priority of application No. 17172429 (EP), filed on May 23, 2017.
Prior Publication US 2020/0170443 A1, Jun. 4, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. A47J 31/52 (2006.01); A47J 31/36 (2006.01); A47J 31/44 (2006.01); A47J 31/46 (2006.01)
CPC A47J 31/5251 (2018.08) [A47J 31/3676 (2013.01); A47J 31/4492 (2013.01); A47J 31/468 (2018.08); A47J 31/5255 (2018.08)] 12 Claims
OG exemplary drawing
 
1. A beverage preparation system for controlling a beverage preparation process by injection of liquid into a cartridge, the system comprising:
a pressure adjustable pump for delivering different pressures upon varying at least one of its drive characteristics;
a sensor for measuring an operating parameter of the pump, the operating parameter comprises at least one of a current provided to the pump, a voltage provided to the pump, or a rotational speed of the pump;
a flow sensor for measuring a liquid flow parameter of liquid injected into the cartridge; and
a control unit to control an extraction pressure of the cartridge by adjusting the drive characteristics of the pump based on pre-established pressure interpolation data depending on the liquid flow parameter measured by the flow sensor and the operating parameter of the pump measured by the sensor.