Marine drive unit with staged energy absorption capability

Details Marine drive unit with staged energy absorption capability Marine drive unit with staged energy absorption capability

2009-06-08

2011-11-22

Olson, Lars A (Department: 3617)

Marine propulsion

Screw propeller

With means effecting or facilitating movement of propulsion...

C440S071000

Reexamination Certificate

active

08062082

ABSTRACT:
A marine propulsion drive unit is provided with two energy absorbing structures, one comprising a crushable or deformable nose cone or leading edge of a driveshaft housing and the other comprising a frangible interface that allows the drive unit to separate from the hull of a marine vessel. The crushable or deformable nose cone is configured to absorb energy at relatively low impact velocities with submerged structures and the frangible interface is configured to absorb energy and then detach from the hull of the marine vessel at higher impact velocities.

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