Patent ID: 8182244

Claim:
A vacuum pump comprising: a pumping chamber ( 13 ) having a rotor ( 7 ) and inside said rotor ( 7 ) are valves ( 10 , 20 ) to control operation of the vacuum pump by opening and closing during a suction and delivery cycle of the vacuum pump, wherein said valves ( 10 , 20 ) comprise parts that are at least partially made of a ferromagnetic material; a magnetic inductor ( 4 ) is mounted exterior to the vacuum pump, on a wall of the pumping chamber, said wall being made of a non ferromagnetic material; and conducting elements ( 11 ) formed of ferromagnetic material placed inside said rotor ( 7 ), said conducting elements ( 11 ) conducting a magnetic flow produced by said inductor ( 4 ), up to polar points ( 12 ) close to positions taken in conditions of inactivity by said valves ( 10 , 20 ), the conducting elements ( 11 ) magnetically attract the valves into an inactivity position upon said inductor being operated, and thus stop pneumatic operation of the pump, even without stopping the pump's motion, which then becomes idle.