Sailboat spinnaker bowsprit

Details Sailboat spinnaker bowsprit Sailboat spinnaker bowsprit

2005-02-22

2005-02-22

Wright, Andrew (Department: 3617)

Ships

Spars

Gaffs, booms, etc.

Reexamination Certificate

active

06857380

ABSTRACT:
A retractable bowsprit for a sailboat is suitable for use with an asymmetrical spinnaker. A support element and a bowsprit positioner such as a track mounted within a hull of a sailboat allow the bowsprit to assume either an extended or retracted position. The bowsprit positioner is mounted to the bottom of the hull. The support element is positioned forward of and above a forward position of the positioner. The bowsprit can slide through the support element, to allow an aft end of the bowsprit to be attached to the positioner's forward point in the extended position. When the bowsprit is so positioned, the geometry causes the bowsprit to rotate, placing a forward end thereof substantially further above the waterline than is the deck, allowing the crew a view beneath an asymmetrical spinnaker attached to the bowsprit forward end.

REFERENCES:
patent: 3830010 (1974-08-01), Lindsey
patent: 3841251 (1974-10-01), Larson
patent: 3968763 (1976-07-01), Mason
patent: 4354447 (1982-10-01), Hultgren
patent: 5176401 (1993-01-01), Chapman
patent: 5765498 (1998-06-01), Hammarstedt
patent: 6189471 (2001-02-01), Mitchell et al.
patent: 6250242 (2001-06-01), Modes
“Antrim 27 Designer's Comments”, http://www.antrimdesign.com/a27index.html, internet publication date established by http://www.archive.org/ as at least as early as Oct. 12, 2002.*
Sven Donaldson, “Open Season”, from Sail, Jun. 2002, pp. 69-74.
Garry Hoyt, “In Full Swing”, from Sail, Tech Notes, Feb. 2004.

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