Lid locking mechanism for a spreader twistlock

Details Lid locking mechanism for a spreader twistlock Lid locking mechanism for a spreader twistlock

2007-07-10

2007-07-10

Mackey, Patrick (Department: 3652)

Handling: hand and hoist-line implements

Spacing hoist bar or frame

Load supporting units

Reexamination Certificate

active

11011846

ABSTRACT:
A lid locking device enables engagement of a container lid for handling, particularly for an intermodal container, and also enables locking and unlocking of the lid to the container. The lid has fittings disposed at each of its four corners, with recesses for rotatable twistlocks carried on a lifting spreader. The lid and the intermodal container have corresponding twistlock fittings, preferably operated in opposite directions, configured to engage so that the container twistlock can be locked and unlocked using an actuator attached to the spreader twistlock, which likewise can be locked an unlocked. The lid is initially engaged to the spreader using the spreader twistlocks, and the spreader is used to move the lid into position on top of the container. As the lid is placed on the container, the container twistlocks insert into the recesses in the lid fittings. The actuator is rotated, concurrently locking the lid to the container and unlocking the lid from the spreader.

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