In-line mechanical disconnect device
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United States of America Patent
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-
Dec 6, 2016
Grant Date -
Jun 11, 2015
app pub date -
Apr 24, 2013
filing date -
Apr 25, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A disconnect device, suitable for placement into a mooring line connecting a floating vessel to an anchor, has a pair of rotably connected lever arm members. In a first, closed position, the lever arm members are held closed by a shear pin. Mating slots in each lever arm member capture a mooring line component, such as the pin of a shackle, when the lever arm members are closed. A cylindrical centering device is placed in the mooring line between the disconnect device and the vessel, and bears against the lever arm members. Force applied to the centering device, whether by pulling it into a surface fairlead sheave or similar device, or by a subsea chaser device, forces the lever arm members apart, breaking the shear pin and releasing the device, thus disconnecting the mooring line.
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