F16D 2001/0906

Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces {using a hydraulic fluid to clamp or disconnect, not provided for in [CPC: F16D1/091]}