US 12,453,436 B2
Coffee grinder with low acoustic impact
Simone Rosetta, Treviso (IT); Marco De Zotti, Treviso (IT); Davide Sgnaolin, Treviso (IT); and Guido Quaratesi, Treviso (IT)
Assigned to De'Longhi Appliances S.R.L., Treviso (IT)
Appl. No. 17/607,109
Filed by De'Longhi Appliances S.R.L., Treviso (IT)
PCT Filed May 19, 2020, PCT No. PCT/EP2020/063894
§ 371(c)(1), (2) Date Oct. 28, 2021,
PCT Pub. No. WO2020/234265, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 102019000007026 (IT), filed on May 20, 2019.
Prior Publication US 2022/0225818 A1, Jul. 21, 2022
Int. Cl. A47J 31/42 (2006.01); A47J 31/44 (2006.01)
CPC A47J 31/42 (2013.01) [A47J 31/4403 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A coffee machine (1) comprising:
a containing hopper (2) for containing a plurality of coffee beans,
a grinder (3) for grinding coffee beans,
a frame (4) comprising a compartment (5), said compartment (5) having at least a housing zone for housing said hopper (2) and a housing zone for housing said grinder (3),
wherein the coffee machine (1) further comprises a shaped elastomeric membrane (6) for sound insulation positioned in said compartment (5) and extending below said hopper (2) to fill empty space present in said compartment (5),
wherein said hopper (2) comprises an unloading mouth (7) for unloading the coffee beans from the hopper (2), and said grinder (3) comprises a receiving mouth (8) for receiving the coffee beans from the hopper (2),
wherein said shaped elastomeric membrane (6) is interposed between said hopper (2) and said grinder (3), said shaped elastomeric membrane (6) comprising a first through opening (9) connecting said unloading mouth (7) and said receiving mouth (8),
wherein said membrane (6) comprises a first gasket (10) extending perimetrally to said first opening (9) for a sealing connection between said unloading mouth (7) and said receiving mouth (8), and
wherein said housing zone for housing said hopper (2) comprises a perimeter shoulder (11) and said membrane (6) perimetrally has a second gasket (12) engaged with said perimeter shoulder (11).