Sailboat keel apparatus

Details Sailboat keel apparatus Sailboat keel apparatus

1982-01-18

1983-04-05

Blix, Trygve M.

Ships

Keels

Vertical adjustment

114124, 114130, 114132, 114344, B63B 4100

Patent

active

043787487

ABSTRACT:
A sailboat carries a pair of opposed keel sections which are angularly positionable about a common hinge axis, either as a keel unit or individually, by means of compressed air biased hydraulic actuators connected via shock absorbers to the keel sections. An additional hydraulic actuator, adjusts the angle of elevation of the hinge axis, enabling the keel unit or sections, when inclined, to provide hydrodynamic lift. The keel sections, which are hollow and contain radially flowable ballast, are configured, when oppositely horizontally positioned to receive the axles of removable wheels, enabling the boat to be self-trailered.

REFERENCES:
patent: 292031 (1884-01-01), Mills et al.
patent: 492022 (1893-02-01), Jessup
patent: 2515564 (1960-07-01), Mercer et al.
patent: 3179078 (1965-04-01), Popkin
patent: 3226738 (1966-01-01), Fox
patent: 3227123 (1966-01-01), Voigt
patent: 3430595 (1969-03-01), Tulleners
patent: 3696684 (1972-10-01), Estlick
patent: 3903827 (1975-09-01), Marcil
patent: 3951090 (1976-04-01), Potter
patent: 3996875 (1976-12-01), Isenberg, Jr.
patent: 4044703 (1977-08-01), Kurtz
patent: 4117797 (1978-10-01), Kelly et al.
International App. No. PCT/GB78/0014 to Sugden.

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