METHOD OF RAISING SUNKEN OBJECT AND DEVICE FOR REALIZATION OF THIS METHOD (VERSIONS) Russian patent published in 1998 - IPC

FIELD: raising sunken objects. SUBSTANCE: grip is secured on sunken object with the aid of stretchable cargo-carrying flexible coupling and lifting force is applied to sunken object due to hauling-in the flexible coupling by means of winches mounted on surface water craft. In course of shortening of flexible coupling when resonance lengths are obtained, tension from object being raised is transferred to auxiliary flexible coupling possessing higher rigidity in tension; auxiliary flexible coupling is located in parallel with main one and its one end is immovably secured on grip and second (bitter end) is secured detachably on main flexible coupling. Upon escape from resonance length zone, tension from auxiliary flexible coupling is transferred to main one and final raising is effected with the aid of main flexible coupling. EFFECT: enhanced reliability. 4 cl, 5 dwg