Not Applicable
Not Applicable
Not Applicable
1. Field of Invention
This invention relates to a method for building a sectionalized, dissassemblable paddleboard, surfboard or sailboard. The invention typically uses two vertically installed bolts to join the board sections
2. Prior Art
With the popularity of surfboards and sailboards there is a need to improve the transportability of the boards. Surfboards and sailboards do not fit into most vehicles, so a roof rack is required for transporting. In addition to the difficulty of adequately tying down the board, it is easy for someone to steal the board off the roof rack. In addition, sunlight will fade the colors and ages the plastic of the board. A sectionalized board, that can be disassembled, will solve these problems. By dividing the board in two or more pieces, the board can be stored inside the vehicle and be locked inside. This saves the time required to tie the board to the roof rack as well as the expense of the rack. The board sections can be stored in the trunk of a car. For storage at home, the disassembled board can easily be stored in a closet and can be maneuvered easily through hallways. To make the assembly acceptable to the user, the assembly and disassembly should only take a few seconds. The assembled board should be as strong as a normal one-piece board with only a small additional weight.
The only successfully marketed sectionalized surfboard design is the design described in U.S. Pat. No. 5,711,692 (1998) to Pope. This design uses clamps and a horizontal tube. The tube fits into receivers in the board sections. One disadvantage is that the tube can bend during use. Another disadvantage is the tube receivers are difficult to make and install into the board. This adds to the cost of making the board. If dirt or sand get into the tube receivers the board can be difficult to assemble or disassemble.
U.S. Pat. No. 5,476,403 (1995) to Hsia describes a sectionalized surfboard, which uses a horizontal pin or bolt to join the sections. This design uses a very long bolt and anchor structures with loops. Since under load, the loops and pin are in tension, the deck of the board must be strong enough to handle the compression loads. The main body of a surfboard is typically made of light foam and significant extra structure must be added to support the loops. U.S. Pat. No. 4,807,549 (1989) to Rhodes et al. describes a sectionalized board design using suitable chevron surfaces and a cable clamp. This board would be very difficult to build with a tight fit and also strong enough. The cable clamping would be difficult to get tight enough to prevent bending.
The sectionalized hull described in U.S. Pat. No. 3,137,873 (1964) to Garrolini discloses a system using telescoping shafts and suitable latches. The sleeves for the shafts would be difficult to mount securely in the surfboard and would add significant weight. In the sectionalized hull disclosed in U.S. Pat. No. 3,287,754 (1966) to Price et al., the hull sections are joined by pairs of clamp assemblies mounted on the upper and lower sides of their respective sections. These clamps would be difficult to install and would be very heavy. Another approach is disclosed in U.S. Pat. No. 3,409,920 (1968) to Brownley who uses a mortise-and-tenon socket and clip arrangement for joining the sections. This design would be difficult to make strong enough.
All these designs are expensive and complicated. They are susceptible to flexing if the parts are not made strong enough or wear with use. They are heavy and difficult to install in a standard surfboard.
The sectionalized surfboard described in my U.S. Pat. No. 7,029,350 (2006) to Katzfey describes a single bolt joining system, which is attached to a central stringer installed in the board. This system uses a long bolt through the top and bottom metal plates.
Many of the surfboards made do not have a central stringer and depend on the board skin and sides (rails) of the board to provide strength.
The sectionalized surfboard described in my U.S. Pat. No. 7,347,755 (2008) to Katzfey describes a two bolt joining system. Two assemblies are attached to the board skin and foam near the sides (rails) of the board to provide strength. This system is used for boards without a central stringer.
The object of the present invention is to provide a sectional surfboard-like board design, which can be adapted to use as a surfboard, paddleboard, or windsurfer. In one embodiment, there are two joining assemblies, which are typically mounted near the left and right sides of the board. My design uses stainless steel metal plates, which are molded into plastic joining assemblies. These assemblies are glued to the top and bottom skins of the board and also glued to the internal foam. On the bottom one side has a formed flat metal hook, which inserts into a slot in a bottom metal plate of the other side for joining the bottom of the board. At the top of the board a short vertically installed bolt passes through a hole in one metal plate and is tightened into a threaded hole in a second metal plate to join the board. This design makes it very easy to assemble and disassemble the board. A large board, such as a Standup Paddle Board, can be quickly assembled with the board horizontal on the ground. The joining parts can be retrofitted to an existing board or built into a new board. In another embodiment, two bolts are used with the installed top metal plates both having threaded holes. A third metal plate with two holes for the bolts is used to attach the top plates. By using different plates with slightly different spacing between the holes, small changes can be made to the board rocker.
In the drawings, where like reference numbers indicate like parts,
An embodiment of the present invention will now be described with reference to the drawings. An example of a surfboard divided into two sections will be used to illustrate this embodiment. The invention is not limited to dividing a board into two sections. There can be as many sections as desired. The surfboard described is divided near the middle into two sections. Boards made with a similar construction method such as paddleboards and sailboards could also be sectionalized.
Number | Name | Date | Kind |
---|---|---|---|
3137873 | Garrolini | Jun 1964 | A |
3287754 | Price et al. | Nov 1966 | A |
3409920 | Brownley | Nov 1968 | A |
4807549 | Rhodes et al. | Feb 1989 | A |
5476403 | Hsia | Dec 1995 | A |
5711692 | Pope | Jan 1998 | A |
7029350 | Katzfey | Apr 2006 | B2 |
7121909 | Meyerhoffer | Oct 2006 | B1 |
7347755 | Katzfey | Mar 2008 | B1 |
7390234 | Peach | Jun 2008 | B2 |