Boat with a raisable and lowerable keel

Details Boat with a raisable and lowerable keel Boat with a raisable and lowerable keel

1986-01-21

1987-09-01

Nase, Jeffrey V.

Ships

Keels

Vertical adjustment

114138, B63B 4100

Patent

active

046900896

ABSTRACT:
A boat with a raisable and lowerable keel is proposed, which can be constructed as a swivel, lifting or ballast drop keel. The keels are fixed to tensioning members either directly or via cables. The tensioning members can be spiral springs, which run in the lifting keel box and are guided in the interior of the lifting keel to the lower end thereof. If the lifting keel is lowered, the spiral springs are tensioned, so that only relatively limited forces are required for raising by means of a spindle (FIG 1).

REFERENCES:
patent: 1022725 (1912-04-01), Delafield
patent: 3371737 (1968-03-01), Hall
patent: 3547065 (1970-12-01), Chauveau
patent: 3572279 (1971-03-01), Smoot
patent: 3902441 (1975-09-01), Scholle
patent: 4004536 (1977-01-01), Bernier
patent: 4316425 (1982-02-01), Guido

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