Patent ID: 11965478
Assignee: DEME OFFSHORE BE N.V.
Field: Handling (Mechanical engineering)
Classification: CPC B  F  Y | IPC B  F

Claim 12:
13. Device for lifting an object from a deck of a vessel subject to movements in a heave direction, the device comprising:
a support surface for the object provided at a first height in the heave direction relative to the deck;
a lifting crane configured to take up the object from the support surface at a lifting point thereof at a lifting speed;
a detector configured to determine the instant in time at which the object is lifted from the surface;
an actuator system configured to lower the support surface relative to the deck at the instant in time the object is lifted from the surface to a second height in the heave direction at a lowering speed,
wherein the actuator system comprises distance-varying means provided between the support surface and a base surface,
wherein the distance-varying means is configured to vary the distance in the heave direction between the support surface and the base surface,
wherein the base surface is provided by a base platform structure configured to be moved across the deck of the vessel in at least one of the surge and sway directions, and
wherein the deck supports a plurality of support surfaces and the base platform structure is configured to be moved across the deck of the vessel to a position underneath each support surface, the base platform structure optionally being provided with wheels to be moved across the deck on rails provided on the deck.