METHOD OF RAISING SUNKEN OBJECT AND DEVICE FOR REALIZATION OF THIS METHOD Russian patent published in 2008 - IPC B63C7/08 B63C7/06 

FIELD: methods of raising sunken objects.

SUBSTANCE: proposed method consists in launching pontoons from base ship which are flooded with water; after securing the pontoons to sunken objects, they are blown with air and are raised to base ship together with sunken object. All pontoons are embraced by holder and cavities are formed inside each of them between rigid envelopes which are hermetic relative to one another and are interconnected by means of rigid strips. In launching the pontoons, pressure of water is built up in each cavity between adjacent envelopes with the aid of water pump. Pressure of water is increased at launching the pontoons from zero on water surface and is reduced at raising the pontoons. Number of envelopes inside pontoon hull is considered to be equal to "n-1", where n ratio of depth H of water basin, m to depth h, m corresponding to limiting pressure the pontoon hull and envelopes are rated at. Proposed method together with device for its realization makes it possible to raise sunken objects from deep depths exceeding limit depth by several times.

EFFECT: enhanced efficiency and reliability.

4 cl, 3 dwg