Ships – Boats – boat component – or attachment
Patent
1992-05-29
1993-08-24
Basinger, Sherman
Ships
Boats, boat component, or attachment
114 56, 114288, B63B 132
Patent
active
052379531
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns an accessory rail for boats, i.e., a rail adapted to be mounted on existing longitudinally extending raisers o spray rails at the bottom of a boat in order to improve the performance of the boat.
U.S. Pat. No. 3,361,104 discloses one kind of accessory rail adapted to be attached to a smooth boat bottom in order to improve the stability of the boat and to cushion the boat against slamming down on the water when cruising in rough sea.
SUMMARY OF THE INVENTION
Contrary to the patent mentioned the object of the present invention is to improve the performance of a boat already provided with conventional spray rails.
A particular object of the present invention is to provide an accessory rail suitable for attachment to existing spray rails of the kind including a substantially horizontal surface and a substantially vertical surface, both extending in the longitudinal direction of a boat bottom.
According to the present invention, an accessory rail adapted to be attached to an existing spray rail includes a mounting portion having a first supporting surface adapted to abut a substantially vertical surface of the existing spray rail, and a rail portion extending downwards from the mounting portion and including a water deflecting surface.
In certain embodiments of the present invention the rail portion includes a second supporting surface adapted to abut a substantially horizontal surface of the existing spray rail.
The mounting portion may be provided with means for its attachment to an existing spray rail such as through holes for screws.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now described more in detail reference being made to the accompanying drawings, wherein:
FIG. 1 is a schematic section through a boat hull the bottom of which is equipped with conventional spray rails, the spray rails on the starboard half of the bottom being provided with accessory rails according to the present invention;
FIG. 2 is a section through a portion of the boat bottom of FIG. 1 showing at an enlarged scale a conventional spray rail and a rail according to the present invention mounted thereto; and
FIGS. 3a-g are sections through various embodiments of the accessory rail according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION
The hull shown in FIG. 1 is a conventional V-bottom hull 1 having a port side 2, a starboard side 3 and a bottom 4 including a port bottom half 5 and a starboard bottom half 6. Both bottom halves are shown being provided with three mutually parallel spray rails 7 extending in the longitudinal direction of the hull.
As is shown more clearly in FIG. 2 each spray rail 7 comprises a substantially horizontal surface 8 and a substantially vertical surface 9. Spray rails of this conventional kind serve as a means to bring a boat faster to a planing position and to stabilize the boat at planing speeds, the substantially horizontal surface lifting the boat and the substantially vertical surface preventing unintended lateral movement. The substantially horizontal surface directs the water flowing along the bottom in a mainly horizontal lateral direction away from the hull, as shown with a dashed arrow H in FIG. 2.
In order to provide more lifting force the present invention aims at directing such laterally flowing water in a downward direction and provides an accessory rail 10 having a mounting portion 11 including a supporting surface 12, and a rail portion 13 including a water deflecting surface 14 and a supporting surface 15. The supporting surfaces 12 and 15 are adapted to closely abut the substantially vertical surface 9 and the substantially horizontal surface 8, respectively, of the spray rail 7. By means of a plurality of longitudinally distributed screws, one screw 16 being shown in FIG. 2, extending through the mounting portion 11 and the substantially vertical surface 9 of the spray rail 7 into the bottom of the boat, the rail 10 is firmly attached to the existing spray rail 7. In this position, the water d
REFERENCES:
patent: 2677139 (1954-04-01), Canazzi
patent: 2919669 (1960-01-01), Kikuhara
patent: 3137261 (1964-06-01), Noe
patent: 3226739 (1966-01-01), Noe
patent: 3361104 (1968-01-01), Glass
patent: 4159691 (1979-07-01), Paxton
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