Ships – Life craft handling device – apparatus – or implement – Davit
Patent
1981-06-01
1983-09-27
Blix, Trygve M.
Ships
Life craft handling device, apparatus, or implement
Davit
B63B 2302
Patent
active
044062443
ABSTRACT:
A launching and recovery apparatus for a lifeboat, rescue launch or like small boat fitted to a ship, floating or fixed marine platform or other vessel which is controlled by a single fall comprises a launching and recovery cradle 7 from which a boat can hang freely on a releaseable support. During its travel between a fully hoisted and a partly lowered position the boat and cradle are supported on trackways 2 extending inwardly and upwardly from the deck of the vessel by roller assemblies 31, 32 at the base of the cradle which run on respective trackways. The cradle 7 has a symmetrical upwardly convergent frame 35, 36, 37 whose apex is arranged for connection of the single fall wire 43 by which the cradle is held in a stable attitude during launching and recovery with the boat suspended freely from the cradle on a single releaseable support 38. A single sheave 15 located above the cradle symmetrically between the trackways 2a takes up or pays out the fall wire 43, to raise or lower the cradle 7. The boat is suspended from a position well above its center of gravity which assists stability in roll and pitch and the arrangement is of simplified construction and uses less moving parts than previous designs of cradle launched boats.
REFERENCES:
patent: 2761571 (1956-09-01), Adams
Buchan Alexander B.
Kingswood Andrew R.
Blix Trygve M.
Sotelo Jesus D.
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