Patent ID: 8656797

Claim:
A spindle drive ( 100 ) having a threaded bolt ( 10 ), a first load path which includes a first nut ( 20 ) which meshes with the threaded bolt ( 10 ), a second load path which includes a second nut ( 22 ) which meshes with the threaded bolt ( 10 ) and is arranged to be movable relative to the first nut ( 20 ) in an axial direction of the threaded bolt ( 10 ) in at least one state of the spindle drive ( 100 ), a sensor unit ( 30 ) configured to detect a relative movement between the first ( 20 ) nut and the second nut ( 22 ), a piston ( 60 ) configured to move upon the relative movement between the first and second nuts ( 20 , 22 ), and an element ( 40 ) connected to the second nut ( 22 ) an having a groove, wherein the sensor unit ( 30 ) includes an LVDT (linear variable displacement transducer) activated by the piston ( 60 ) to detect position of the piston ( 60 ), and the piston ( 60 ) is arranged, in a normal operating state, in the groove of the element ( 40 ) connected to the second nut ( 22 ) and moves in event of a defect, in a radial direction relative to the second nut ( 22 ).