Patent ID: 6082947
Filing Date: 2000-07-04
Classification: B63B,B66C,B66D

Abstract:
A coordinated motion lifting device for use in a marine environment to position a load and neutralize relative movement between a source position and a destination position comprising:a main A-Frame assembly including a base, a primary means for support in pivotal engagement with said base including a proximal end and a distal end, and lifting means operatively attached to said primary means for support distal end;a sub A-Frame assembly including a secondary means for support in pivotal engagement with said primary means for support including a proximal end and a distal end, and a docking means in pivotal engagement with said secondary means for support distal end, said secondary means for support operatively coupled with at least one extensible connecting means in mechanical engagement with said secondary means for support distal end and said lifting means; anda heave compensation assembly including means for providing coordinated reciprocal movement between the main A-Frame assembly and sub A-Frame assembly;whereby said coordinated reciprocal movement acts to adjust the instantaneous load position thereby neutralizing the relative movement between the source position and destination position.