Patent ID: 8474785

Claim:
A valve assembly comprising a valve housing, a spindle which is arranged in the valve housing, the spindle being arranged perpendicularly with respect to a flow direction, and a shutoff element which is movably connected to the spindle, wherein the spindle has an apparatus for limiting torque, the apparatus for limiting torque comprises a cage region which is operatively connected to the spindle and a disk region which is operatively connected to an actuating apparatus, the cage region and the disk region have mating toothing systems which are matched to one another, and wherein the toothing system of the cage region has tooth flanks with flank angles α and β of different configuration, the flank angles α and β change continuously and a flank angle α plus flank angle β remains constant during the axial movement of the cage region perpendicularly with respect to the flow direction and relative to the disk region.