1989-11-22
1991-04-16
Scherbel, David A.
Ships
Spars
Masts and masting
B63B 1500
Patent
active
050073605
ABSTRACT:
A pole structure comprising two elongated sheet metal or extruded sections (1 and 2) which are joined together by spacers (7) to provide a gap (5) between the adjacent edges of the elongated sections (1 and 2). This structure provides access to the interior and is most suitable for utilization as a mast of a sailing yacht, being lighter in weight than the standard masts yet being as structurally stable and flexible.
REFERENCES:
patent: 449375 (1981-03-01), Meyer et al.
patent: 1574563 (1926-02-01), Duff
patent: 2454640 (1948-11-01), Eichner
patent: 2519230 (1950-08-01), Crankshaw
patent: 3571991 (1971-03-01), Doocy et al.
patent: 3572528 (1971-03-01), Morton et al.
patent: 4480570 (1984-11-01), Rosenfield et al.
Abraham Joseph
Gracie Phillip
Hamonet Michael
Hood Warwick J.
Mai Lan
Scherbel David A.
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