Cargo vessel lid lifting system

摘要

An apparatus including a base, a guide arm pivotable relative to the base, the guide arm movable between a raised position and a lowered position. A tension linkage having a distal end extending away from the base, the tension linkage supported by the guide arm when the arm is in the raised position. A tension linkage guide disposed on the guide arm, the tension linkage guide movable along the tension linkage as the guide arm moves between raised and lowered positions. A lid hook connected to the distal end of the tension linkage. When the lid hook is engaged with a cargo vessel lid, the tension linkage forms a first tension angle and a second tension angle when the guide arm is in the raised position and the lowered position respectively, the second tension angle being less than the first tension angle.

主权项

1. An apparatus for moving a cargo vessel lid, the apparatus comprising:
a base; a guide arm pivotable relative to the base, the guide arm movable between a raised position and a lowered position; a tension linkage having a distal end extending away from the base, the tension linkage supported by the guide arm when the guide arm is in the raised position; a tension linkage guide disposed on the guide arm, the tension linkage guide movable along the tension linkage as the guide arm moves between the raised position and the lowered position; and a lid hook connected to the distal end of the tension linkage; the tension linkage forming a first tension angle with respect to a horizontal reference axis passing through the lid hook when the lid hook is engaged with the cargo vessel lid and the guide arm is in the raised position; the tension linkage forming a second tension angle with respect to the horizontal reference axis when the lid hook is engaged with the cargo vessel lid and the guide arm is in the lowered position wherein the second tension angle is less than the first tension angle.