Resilient mast hinge

Details Resilient mast hinge Resilient mast hinge

1981-12-28

1984-06-12

Blix, Trygve M.

Ships

Spars

Masts and masting

114 89, 114 90, 114 91, 114 98, 16280, 16DIG33, 16DIG36, B63B 1500

Patent

active

044534825

ABSTRACT:
A radar loaded, hollow yacht mast is disclosed which is pivoted at the bottom to the deck by a tri-sectioned elastomeric torsion spring hinge assembly in which the torsion is produced by relative rotation between the inner section and the two outer sections. The torsional resistance of the hinge assembly prevents the mast from falling when the bolts and stays are removed and the restoring force in the spring elastomer when the mast is pivoted flat to the deck assists in raising the mast back into its upright position. A hollow, flanged mounting connecting the hollow mast to the movable section of the hinge assembly prevents sea water from entering the hollows. Provisions are provided for pre-loading the hinge spring with a torsional stress in either direction when the hinge is closed.

REFERENCES:
patent: 270358 (1883-01-01), Aldrich
patent: 2981970 (1961-05-01), Nayes et al.
patent: 3311946 (1967-04-01), Crankshaw
patent: 3336021 (1967-08-01), Kramer
patent: 3507240 (1970-04-01), Butler
patent: 4016823 (1977-04-01), Davis

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