Buoys – rafts – and aquatic devices – Water skimming or walking device – Having stabilizing surface
Patent
1991-09-03
1993-02-02
Basinger, Sherman
Buoys, rafts, and aquatic devices
Water skimming or walking device
Having stabilizing surface
114132, B63B 3579
Patent
active
051833670
ABSTRACT:
A dagger board bearing for sailboards, developed with the objective of improving sailing properties, exhibits a dagger board casing (4) inserted in a sailboard (1) wherein a dagger board (5) introducible from above is pivotably supported with a first handle (6) projecting beyond the topside of the board (5). An external pivot pin (12) in the zone of the top edge (13) of the dagger board (5) and an internal pivot pin (14), offset with respect to the external pivot pin (12) are molded to a top section (11) of the dagger board (5). The pivot pins (12, 14) are arranged on one side of the top section (11) of the dagger board (5) with a mutual first spacing (a) in the longitudinal direction of the dagger board (5) and with a mutual second spacing (b) in the transverse direction of the dagger board (5). An exchangeable insert panel (17) with two guide and bearing grooves (18, 19), fashioned in a curved shape for receiving the pivot pins (12, 14), can be inserted in a sidewall (16) of the dagger board casing (4), guide rollers (15) being mounted on these pivot pins (12, 14). The two-point pivot bearing permits, as compared with conventional dagger board bearings, a displacement of the first handle (6) into a position (6a) shifted in the direction of the stern, with the dagger board (5) being swung inwards, thus causing a corresponding displacement of a rearmost position of a mast foot (10) in the stern direction. In this way, the velocity of the sailboard (1) in case of off-wind sailing courses is increased.
REFERENCES:
patent: 3087173 (1963-04-01), Meyer
patent: 4721051 (1988-01-01), Willard
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