the pair of conical mating surfaces being provided on the coupled hub and shaft

Full Title

Couplings for rigidly connecting two coaxial shafts or other movable machine elements (attachment of wheels to axles for railway carriages B60B; for attachment of cranks to their shafts F16C3/10) > for attachment of a member on a shaft or on a shaft-end (attachment of marine propellers on shafts B63H23/34) > with clamping hub; with hub and longitudinal key > with radial clamping due to axial loading of at least one pair of conical surfaces > the pair of conical mating surfaces being provided on the coupled hub and shaft