US 11,986,122 B2
Process for improving the uniformity of concentration of espresso coffee in an espresso coffee machine and associated espresso coffee machine
Stefano Della Pietra, Scarperia (IT); and Riccardo Gatti, Scarperia (IT)
Assigned to LA MARZOCCO S.R.L., Scarperia (IT)
Appl. No. 17/059,679
Filed by LA MARZOCCO S.R.L., Scarperia (IT)
PCT Filed Jun. 7, 2019, PCT No. PCT/IB2019/054750
§ 371(c)(1), (2) Date Nov. 30, 2020,
PCT Pub. No. WO2019/234696, PCT Pub. Date Dec. 12, 2019.
Claims priority of application No. 102018000006140 (IT), filed on Jun. 8, 2018.
Prior Publication US 2021/0204748 A1, Jul. 8, 2021
Int. Cl. A47J 31/30 (2006.01); A47J 31/52 (2006.01)
CPC A47J 31/303 (2013.01) [A47J 31/5251 (2018.08)] 11 Claims
OG exemplary drawing
 
1. A machine for the preparation and dispensing of an espresso coffee comprising:
a coffee boiler,
a filter holder comprising a filter for a pressed coffee powder puck,
a pre-infusion chamber,
a hydraulic circuit for transporting pressurized water from the coffee boiler to the pre-infusion chamber, and
a flowmeter which is arranged in the hydraulic circuit and which is configured to detect a slowing of water flow, wherein the slowing of the water flow is indicative of filing of the pre-infusion chamber and of the hydraulic circuit, so that dispensing the espresso coffee can be started on the basis of the detected slowing of the water flow.