Coupling device for transfer between a static structure and a dy

Details Coupling device for transfer between a static structure and a dy Coupling device for transfer between a static structure and a dy

1998-04-16

2000-10-17

Lisehora, James A.

Bridges

Gangway, ramp, or dock leveler

14 711, 14 713, 14 725, B63B 2714, E01D 1524

Patent

active

06131224&

ABSTRACT:
An improved coupling device for the transfer of personnel or objects between a static and a dynamic structure, such as between an offshore platform and a support vessel, which has two trunnion assemblies and a connecting bridge operating such that the dynamic structure is free to pitch, roll, and move in the horizontal plane with very little of this motion being translated to the connecting bridge. Also, any vertical motion of the dynamic structure, such as rising and falling over waves, is transformed and reduced by an order of magnitude in the same timeframe, when translated to the connecting bridge. Support is provided to one end of the connecting bridge by a trunnion assembly attached to a static structure. This trunnion assembly allows the connecting bridge to rotate around the Y and Z axes relative to the static structure, in a motion similar to a turntable arm. The other end of the connecting bridge is supported by a second trunnion assembly which remains in contact with the dynamic structure and absorbs its pitch, roll, and motions in the horizontal plane, while translating very little of this motion to the connecting bridge. This allows both personnel and objects to be transported between structures in rough seas at times when such transfer might ordinarily be precluded.

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