Rotating comminuting attachment for use with portable kitchen appliances of the electric mixer-type

Claim 1

A ROTATING COMMINUTING ATTACHMENT FOR USE WITH PORTABLE KITCHEN APPLIANCES, OF THE ELECTRIC MIXER-TYPE AND INCLUDING AN ELECTRIC MOTOR DRIVING AN OUTPUT COUPLING THROUGH REDUCTION GEARING, SAID ATTACHMENT COMPRISING, IN COMBINATION, A DRIVE SHAFT ARRANGED AT ITS UPPER END FOR COUPLING TO THE OUTPUT COUPLING OF SUCH APPLIANCE, FOR ROTATING AT AN ANGULAR VELOCITY SUBSTANTIALLY LESS THAN THAT OF THE MOTOR ARMATURE; A KNIFE BLADE SECURED TO THE LOWER END OF SAID SHAFT AND INCLUDING RADIALLY EXTENDING WINGS HAVING FIRST CUTTING EDGES AT THEIR RADIALLY OUTER ENDS; AND A STATIONARY DOWNWARDLY OPENING BELL SURROUNDING SAID KNIFE BLADE AND FORMED WITH COUNTER CUTTING EDGES COOPERABLE WITH SAID FIRST CUTTING EDGES TO COMMINUTE THE MATERIAL TO BE CUT; THE LOWER EDGES OF SAID BLADE WINGS BEING FORMED AS CUTTING EDGES TO PRE-CUT THE MATERIAL TO BE COMMINUTED; SAID BELL INCLUDING A SUBSTANTIALLY CYLINDRICAL WALL IN THE ZONE OF SAID KNIFE BLADE; SAID WINGS BEING BENT IN A TRAILING DIRECTION WITH RESPECT TO RADII OF SAID CYLINDRICAL BELL WALL, WHEREBY TO FORM ACUTE ANGLES WITH SAID CYLINDRICAL BELL WALL.