Patent ID: 8061684

Claim:
An anti-twist device for an actuating motor ( 10 ) which is fitted in a non-positive and/or positive manner on the projecting drive shaft ( 22 ) of a pivotable shut-off flap ( 62 ) of a gas transportation pipe ( 34 ), wherein a) at least one U-shaped clamp ( 36 ) is provided which has two spreadable limbs ( 46 ), b) the clamp ( 36 ) is connected to said gas transportation pipe ( 34 ) so that it is arranged at a distance (a) from the drive shaft ( 22 ), c) the limbs ( 46 ) hold said actuating motor ( 10 ) such that it can move in the longitudinal direction, and d) the limbs ( 46 ) of the clamp ( 36 ) in each case have an inwardly projecting latching lug ( 48 ) for holding down the actuating motor ( 10 ), which latching lugs ( 48 ) surround said actuating motor ( 10 ) or engage in a longitudinally running groove of said actuating motor ( 10 ).