Adjustable Self-Releasing Hook.
DEPARTMENT OF THE NAVY WASHINGTON DC
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This patent is for a load lowering hook which is equipped with a spring biased load holding member to eject and disengage the load rigging when the load touches down and the majority of the weight is released. The spring loaded member can be adjusted to disengage the load at a preset weight depending upon the weight of the rigging that will still be pulling on the hook after the load touches down.
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