| 摘要 |
Coffee-grinder of the type with grinding group having coaxial toothed wheels (12) with a rotating toothed part with respect to a fixed toothed crown (123) with internal charging of the grains and peripheral discharge of the fine ground coffee (116), characterised in that: said fixed toothed crown (123) is substantially spiral-like flat with decreasing pitch towards the periphery and fixed on an overhanging fixed supporting means (112-1231) said rotating toothed part is made up of two parts: a substantially flat counter-crown (122) toothed like the fixed one, spiral-like with decreasing pitch towards the periphery (122') for grinding the beans into an always finer size (123'-122') and a pinion (121) having a star-like pyramidal shape (121') with a fin-like shaped toothing which extends with grooves becoming always less deep towards the periphery of the lower base (121') which substantially develops for the whole height of said fixed crown (123) and counter-crown (122).
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