Coffee grinder for crushing coffee beans has gear that drives grinding mill at a speed within a predetermined speed range such that ground coffee is ejected without leaving residues in housing

摘要

A grinding mill (7), motor (3) and gear (5) are accommodated within a housing (4). A storage vessel (35) has an outlet for delivering coffee beans to the grinding mill. The housing consists of a noise-absorbing casing. The gear drives the grinding mill at a speed of 60 to 300 revolutions per minute (RPM) such that the grinding mill ejects the ground coffee without leaving residues in the housing.