Effective dampening of shocks, load fluctuations and torsional vibrations. Helpful in improving the drive duty conditions in 8. 9. machines subjected to shock loads, frequent load changes, startups and reversals. Smooth and controlled acceleration of driven machines. Important for machines such as conveyors, wire drawing and textile machines. Stepless speed variation in wide range obtained in scoop type fluid couplings. 10. Continuous clutching and declutching of large drives obtained from SC type couplings. 11. Economy on machine and drive designs. 12. ENERGY SAVING