Patent ID: 8511641

Claim:
A control apparatus ( 1 ) for braking valves for operating machines, comprising a fluid valve ( 2 ) for controlling a braking system of an operating machine and having at least a control cursor ( 3 ) for distributing an operating fluid, at least a control mechanism ( 4 ) for controlling said cursor ( 3 ), at least a sensor device ( 12 ) for detecting the position of at least one of said control mechanism ( 4 ) and said cursor ( 3 ), magnetic means ( 8 ) operatively connected to at least one of said control mechanism ( 4 ) and said cursor ( 3 ) for cooperation with said sensor device ( 12 ), said sensor device being sensitive to variations in a magnetic field, wherein said magnetic means ( 8 ) comprises at least a magnetic element ( 9 ) which is driven in movement by at least one of said cursor ( 3 ) and said control mechanism ( 4 ), said magnetic element ( 9 ) being arranged mobile inside a seat ( 10 ) obtained in a support ( 11 ) permeable to the magnetic field, and wherein said sensor device ( 12 ) is associated with said support ( 11 ) on a substantially opposite side compared to said seat ( 10 ) and is suitable for detecting the variations in the magnetic field resulting from the movement of said magnetic element ( 9 ), and wherein said magnetic means ( 8 ) further comprises a sustaining element ( 13 ) of said magnetic element ( 9 ), fitted turning in said seat ( 10 ) and having a first extremity ( 13 a ), that is operated in rotation by the motion of at least one of said cursor ( 3 ) and said control mechanism ( 4 ), and a second extremity ( 13 b ), which is associated with said magnetic element ( 9 ).