Patent ID: 8021151

Claim:
A surgical device, notably a dental device, comprising: an instrument provided with a rotary motor for driving a tool and at least one sensor for determining at least one operating parameter of said motor, an electronic servo-control module of the motor, an electric accessory comprising a lamp that illuminates a work zone of the instrument, a flexible connection for electrically connecting said instrument to said electronic module, said flexible connection comprising three electric leads for electrically powering said motor and one electric lead for powering said electric accessory, said instrument comprising a digital electronic circuit for processing the output signals of said at least one sensor and transmitting them to said electronic module through the flexible connection as digital data, wherein said digital data is transmitted over the electric lead for powering said electric accessory by digital modulation, wherein a terminal of said electric accessory is connected to said lead of the flexible connection used for powering said electric accessory while another terminal of said electric accessory is connected to a neutral point between phases of said motor, wherein an operation of said electric accessory is controlled by said digital electronic circuit.