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US 4,905,620 AGranted
Watertight mast for sailing vessel
AssigneeCKY, Inc.
InventorJohn R. Newton
Life of this patent
Estimating the term…
Abstract
A mast is provided which functions as both a mast and a righting lever which provides an immediate and powerful addition to the righting moment of a sailing vessel. The mast comprises a hollow longitudinal member adapted for carrying a sail. The longitudinal member contains one or more internal compartments which are sealed to prevent fluid communication to the interior of the mast.
Claims1
A mast for a sailing vessel, comprising:
- (a) an outer hollow longitudinal member adapted for carrying a sail and imperious to water, said member possessing sufficient strength to withstand the forces of a sail and to propel a sailing vessel at its hull speed;
- (b) one or more inner hollow longitudinal members impervious to water having means for communicating with the exterior of said mast;
- (c) one or more annular internal compartments defined by the inner wall of said outer member and the outer wall of said inner member or members, said internal compartment or compartments being sealed to substantially inhibit fluid communication between said internal compartment or compartments and the exterior of said mast, said internal compartment or compartments being of sufficient capacity to impart a positive righting moment when said mast is in contact with the water.
Dependencies are inferred from the claim text.