Ergonomic whisk for food processing

A machine for stirring a liquid food substance as a standalone machine or as a machine incorporated in a food processor, the machine comprising:

• a container defining a cavity with a bottom and a peripheral wall for containing the liquid food substance to be stirred, the cavity extending generally along a generally upright central container axis and having a mouth for removing from the container the liquid food substance upon stirring;
• an impeller comprising an impelling member, which is configured to be rotated in the cavity against the liquid food substance about an impeller axis that is generally identical or generally parallel to the container axis;
• and
• the impelling member is configured to be spaced above the bottom of the cavity by:
• a maximum stirring distance defined between the impelling member and the bottom of the cavity when the impelling member is rotated at a maximum stirring level at a maximum stirring speed about the impeller axis;
• and
• a resting distance defined between the impelling member and the bottom of the cavity when the impelling member stands still at a resting level,
• the maximum stirring distance being greater than the resting distance,
• wherein the impeller has a support that is relatively movable to the impelling member and that is rotated to rotate the impelling member, the support having at least one surface selected from the group consisting of (i) a drive surface and (ii) a peripheral upright guide surface that is rotated to rotate the impelling member,
• wherein the drive surface comprises a cam that engages with a cam-follower of the impelling member for moving the impelling member to the maximum stirring level when the impelling member is rotationally accelerated towards the maximum stirring speed and for moving the impeller towards the rest level when the impelling member is rotationally decelerated towards stand still.