Anti-sway, anti-rotation mechanism for crane reeving
AssigneeHarnischfeger Corp. of Canada Ltd.
InventorsCornelius J. M. Van Soest, Rostislav Muller, Stjepan Bagaric
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Abstract
An anti-sway, anti-rotation mechanism for crane reeving comprises four spaced-apart overhead sheaves on an overhead support. A lifting beam assembly has four pairs of lifting beam sheaves. The pairs of lifting beam sheaves are spaced-apart from each other. A grapple is pivotally connected to the lifting beam assembly. Cables are connected to the winding drum and extend between each pair of lifting beam sheaves and two adjacent overhead sheaves in a V-shaped arrangement to keep the lifting beam assembly level and prevent the lifting beam assembly from swaying and rotating, during operation of the crane.
Claims6
An anti-sway, anti-rotation mechanism for reeving of a crane having an overhead support with a winding drum, the mechanism comprising:
- four spaced-apart overhead sheaves on the overhead support, the winding drum being between two pairs of the overhead sheaves;
- a lifting beam assembly with four pairs of lifting beam sheaves, the pairs of sheaves being spaced-apart from each other;
- load carrying means connected to the lifting beam assembly;
- and
- four cables comprising two pairs of adjacent cables extending downwardly from the winding drum, each cable extending downwardly and about one said lifting beam sheave of one said pair of lifting beam sheaves, then upwardly and about an overhead sheave, then downwardly and about another said lifting beam sheave of another pair of lifting beam sheaves adjacent said one pair of sheaves, then upwardly to an end of the cable adjacent the overhead support to prevent swaying and rotation of the lifting beam assembly during operation of the crane and to keep the lifting beam assembly level.
Dependencies are inferred from the claim text.