Patent ID: 7685933

Claim:
A device for processing food, the device comprising: an electric motor including a motor shaft, wherein the motor shaft is rotatable in two directions; a tool carrying shaft adapted to drive at least one cutting tool, the tool carrying shaft being substantially parallel to the motor shaft; and a coupling assembly adapted to transmit power generated by the electric motor to the tool carrying shaft, the coupling assembly including two distinct coupling sub-devices, each coupling sub-device having at least one wheel mounted to one of either the motor shaft and the tool carrying shaft via a free wheel rotatable without load in a first direction of rotation, and transmitting a torque by friction in a second, opposite direction of rotation, wherein only one of the coupling sub-devices transmits the power generated by the electric motor to the tool carrying shaft when the motor shaft is rotating in one of the two directions, and the other of the coupling sub-devices transmits the power generated by the electric motor to the tool carrying shaft when the motor shaft is rotating in the other of the two directions, and wherein the coupling sub-devices have different coupling ratios such that the tool carrying shaft has a different speed of rotation depending on a direction of rotation of the motor shaft.