US 12,138,668 B2
Device and method for cleaning grinders
Daniele Colizza, Casarile (IT)
Assigned to CMA Macchine per Caffé S.r.l., Susegana (IT)
Appl. No. 17/767,680
Filed by DRM S.r.l., Casarile (IT)
PCT Filed Oct. 15, 2020, PCT No. PCT/IB2020/059674
§ 371(c)(1), (2) Date Apr. 8, 2022,
PCT Pub. No. WO2021/074830, PCT Pub. Date Apr. 22, 2021.
Claims priority of application No. 102019000018827 (IT), filed on Oct. 15, 2019.
Prior Publication US 2024/0116089 A1, Apr. 11, 2024
Int. Cl. A47J 42/06 (2006.01); A47J 42/10 (2006.01); A47J 42/40 (2006.01); A47J 42/44 (2006.01); A47J 42/50 (2006.01); B08B 5/02 (2006.01)
CPC B08B 5/023 (2013.01) [A47J 42/06 (2013.01); A47J 42/10 (2013.01); A47J 42/40 (2013.01); A47J 42/44 (2013.01); A47J 42/50 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A device for reducing coffee beans to powder, comprising:
a primary tank or hopper (01) for containing the coffee beans;
a grinding chamber (200), having a substantially truncated-cylindrical shape, fed by the coffee beans coming from said hopper via feed openings (07), said grinding chamber being equipped with grinding surfaces integral with a main body or with counter-grinders (240), said grinding chamber housing one or more motorized rotating bodies or rotating grinders (230), which rotate around an axis substantially coaxial to a cylindrical axis of the said grinding chamber and which cooperate with said chamber during a process of reducing the coffee beans or grinding and consequent production of powdered coffee;
one or more unloading ducts (270) to unload the powdered coffee from the grinding chamber, said one or more unloading ducts (270) being connected to the grinding chamber by a connecting element (250) with an opening proximal to an outlet mouth (221) of said grinding chamber, said one or more unloading ducts channeling said powdered coffee coming out of said grinding chamber;
a ground coffee collecting zone,
said device further comprising:
means for a manual or automated removal of coffee powder residues or of accumulations thickened inside said grinding chamber or on surfaces of members involved in a grinding process using a gas or gas mixtures introduced through a duct (224o) leading into the grinding chamber and having opening (224o) to supply said gas or gas mixtures inside said grinding chamber; and
a control member controlling a flow of said powdered coffee to prevent a formation of lumps in the powdered coffee, said control member having an opening (251) in said connecting element (250) to introduce the gas or gas mixtures for the removal of the powdered coffee inside the connecting element and inside said unloading ducts (270) and further having a second opening (223o) adjacent to said outlet mouth (221) to introduce the gas or gas mixtures adjacently to said outlet mouth (221).