Frustoconical drum winch for lifting loads with hook reduced approximation lifting height
AssigneeFlexcrane, Inc.
InventorVitor Hugo Carneiro dos Santos Neves
Life of this patent
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Abstract
A load lifting winch suspending a load from a hook (3) and a cable (5) which is wound onto a frustoconical drum (1) in order to reduce the winch vertical dimension when the hook (3) is in the fully upright position allowed by available vertical space elevation, and simultaneously decrease the forces applied to the lifting drive motor (4) as the load rises.
Claims3
A frustoconical drum winch for an overhead or gantry crane for lifting loads from a surface on which the loads are positioned, to a height elevated above the surface with hook reduced approximation lifting height, characterized by using a hook that lifts by winding a cable on a frustoconical drum up to a height dimension higher than a lower point of a median diameter of the frustoconical drum, wherein a top frustoconical generatrix of the frustoconical drum has a fixed orientation relative to the surface from which lifting is to be performed and an upper sheave with a rotation axis that forms a tilt angle α from a rotation angle of a drive motor for the winch, said tilt angle being greater than zero relative to a rotation axis of the drive motor for the winch.
Dependencies are inferred from the claim text.