Sailboat mast floatation device

Details Sailboat mast floatation device Sailboat mast floatation device

1992-06-01

1993-10-26

Swinehart, Edwin L.

Ships

Building

Insubmergible vessels

114 61, 114 90, B63H 904

Patent

active

052556247

ABSTRACT:
An inflatable mechanism for attachment to the top of a sailboat mast to counteract turtling (complete rotation of the boat into an inverted position where the mast is pointed straight down into the water) during a capsize. The device functions by producing a torque consisting of the water displacement force and the mast as a lever arm. When the boat tips over on its side during a capsize this torque balances the boat's natural tendency to continue to roll over into an inverted position.

REFERENCES:
patent: 797136 (1905-08-01), Manlove
patent: 1412803 (1922-04-01), Frantz
patent: 3016858 (1962-01-01), Johnson
patent: 3016859 (1962-01-01), Johnson
patent: 3016860 (1962-01-01), Johnson
patent: 3889045 (1975-06-01), Logsdon
patent: 4461230 (1984-07-01), Hartley et al.
patent: 4651666 (1987-03-01), Lake
patent: 4850912 (1989-07-01), Koyanagi

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