US Patent 9975743 Pulley

A pulley comprises: a monobloc sheave comprising two opposing longitudinal faces, a transverse central recess and a concave external surface forming an annular groove which is provided in order to redirect a rope, the central recess and the concave external surface being fixed relative to each other, a fixing rope of the sheave, which extends through the central recess of the sheave, the fixing rope being in direct contact with the central recess, a spacer element which is arranged in order to space the fixing rope away from the longitudinal faces of the sheave.