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Triple5 Home |
Design Requirements |
Primary Design
Feature |
Triple5 Video
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Detail Sections: |
Primary |
Secondary |
Operator Interface |
Maintenance Interface |
Triple5 – Secondary Design Requirements
Following on from the Primary design requirements
which focused on the central concept of the hook
there were additional Secondary design requirements.
These focused on design issues that had proved
problematic with many conventional twin-fall hook
designs..
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No Critical “Wear Areas” that Lead to
Inadvertent Hook Release or Reduce Component
Life
Many twin-fall hook designs have critical
“wear areas” (in particular, and most
dangerously, on the tail of the actual
hook). These can and have led to inadvertent
hook release, leading to the dropping of a
lifeboat which has resulted in injuries and
fatalities. In other cases these wear areas
may not have dropped a lifeboat but they
significantly reduced component and hook
life expectancy.
No Coils or Springs to Fail or Lose
Tension
Previous twin-fall release mechanism designs
have included coils and springs which can
loose tension and impact the functionality
of the release mechanism. A design
requirement for the Triple5 hook was that
there were are no coils or springs.
No Fine Tolerances
Fine tolerances have been employed in the
design of many twin-fall hooks. These fine
tolerances require precision measurements
when performing a service on the hook. Such
fine tolerances can lead to a hook getting
out of tolerance with use. When a hook slips
out of this fine tolerance there is a danger
of premature release.
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Detail Sections: |
Primary |
Secondary |
Operator Interface |
Maintenance Interface |
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