Removable anchor having retrievable ballast

Details Removable anchor having retrievable ballast Removable anchor having retrievable ballast

1976-05-07

1977-09-20

Blix, Trygve M.

Ships

Anchor

61 98, B63B 2124

Patent

active

040489450

ABSTRACT:
Method and apparatus which provides a retrievable anchor for a floating vessel. The apparatus includes a ballast chain secured to a winch located on the vessel. The chain is lowered into a submergible anchor shell which together with the chain forms the anchor. A conduit can be provided for conveying to the shell a fluid for preventing corrosion and marine life growth on the chain.
The method includes connecting a ballast chain to an anchor shell and lowering it to the water bottom using the chain as a supporting link between the floating vessel and the shell. Once the shell is on the bottom, more ballast chain is placed into it so that the chain and the shell provide the necessary fixity for mooring the vessel. Subsequently, the upper end of the chain is connected to a pendant (a suspended rope secured to a locking means on the vessel) which may be used to lower the remaining portion of the chain. The chain and pendant can be tensioned so that, as they are respectively lowered through the water, they do not become entangled with nearby objects. A floating vessel is connected to the anchor shell by the pendant or an upper portion of the chain.
A conduit for moving a fluid to prevent marine growth and chain corrosion is connected at one end to a source of the fluid, while its other end is lowered into the anchor shell. Fluid flow is terminated when sufficent fluid is in the anchor shell. These steps are reversed when the anchor is to be retrieved and the floating vessel is to be relocated.

REFERENCES:
patent: 3111926 (1963-11-01), Shatto, Jr.
patent: 3394553 (1968-07-01), Vidal
patent: 3431879 (1969-03-01), Westling
patent: 3780685 (1973-12-01), Horton
patent: 3842776 (1974-10-01), Wudtke

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