Viscous Coupling Unit - Attributions

Attributions

Tony Rolt is often credited with the original idea and development as applied to automatic couplings in vehicle transmission systems, particularly four-wheel drive, working with Freddie Dixon at the time. Ferguson Research Ltd. and FF Developments were the companies formed (1970's) to commercialise much early work into 4WD systems and devices. It is thought that GKN Driveline own any remaining worldwide patents today and offer several variants and combinations of Viscous Couplings integrated with other driveline components.