In a boat trailer for hauling a tunnel hull speed boat, wheels revolvably mounted on a cradle on which the boat rests are arranged to allow the periphery of the wheels to engage the overhead of the tunnel of the boat to permit the boat to roll easily from the trailer when released to do so, and to b
In a boat trailer for hauling a tunnel hull speed boat, wheels revolvably mounted on a cradle on which the boat rests are arranged to allow the periphery of the wheels to engage the overhead of the tunnel of the boat to permit the boat to roll easily from the trailer when released to do so, and to be easily mounted on the trailer from the water when the boat is afloat. The wheels are preferably mounted on stanchions, and arranged to be raised to the overhead engaging position from a position at which the wheels are not supporting the boat.
대표청구항▼
The invention claimed is: 1. In a boat trailer for hauling a tunnel hull speed boat having spaced sponsons with inner side walls, and a substantially planar overhead between said sponsons, defining with said inner side walls, a tunnel, said trailer having a wheeled frame and a cradle, carried by sa
The invention claimed is: 1. In a boat trailer for hauling a tunnel hull speed boat having spaced sponsons with inner side walls, and a substantially planar overhead between said sponsons, defining with said inner side walls, a tunnel, said trailer having a wheeled frame and a cradle, carried by said frame, on which said boat is seated, the improvement comprising cradle wheels revolvably mounted on said cradle inboard of said inner side walls to allow a periphery of said cradle wheels to engage said overhead of said tunnel to permit the boat to roll easily from the trailer when released to do so, and to be easily mounted on said trailer from the water when the boat is afloat. 2. The improvement of claim 1 including means for tilting said cradle. 3. The improvement of claim 2 wherein said cradle wheels are carried on stanchions mounted inboard of said inner walls, said cradle wheels are mounted inboard of said stanchions, and means are provided on said stanchions for raising said cradle wheels from a position at which said cradle wheels are out of engagement with said overhead to a position at which said cradle wheels engage said overhead. 4. The improvement of claim 3 wherein the stanchions are hollow, one part being fixedly secured to the frame and another part being slidably mounted on said fixed part, and said means for raising said cradle wheels are at least partly enclosed in said fixed part. 5. The improvement of claim 4 wherein a hydraulic cylinder and piston constitute the raising means, the piston being connected to the sliding member of the stanchion. 6. The improvement of claim 1 including means provided for raising said cradle wheels from a position at which said cradle wheels are out of engagement with said overhead to a position at which said cradle wheels engage said overhead. 7. The improvement of claim 6 wherein the means for raising said cradle wheels are hydraulic. 8. The improvement of claim 7 wherein the hydraulic means for raising said cradle wheels are programmed to raise cradle wheels at a bow higher than cradle wheels at a stern of the boat at launching. 9. The improvement of claim 6 wherein the means for raising said cradle wheels are programmed to raise cradle wheels at the bow higher than cradle wheels at the stern of the boat, and to raise cradle wheels intermediate said wheels at a bow and stern an appropriate intermediate distance. 10. The improvement of claim 6 wherein the means for raising said cradle wheels are programmed to raise cradle wheels at a bow higher than cradle wheels at a stern of the boat at launching, said cradle wheels at the stern being raised higher during retrieval of the boat than during the launch of the boat, and cradle wheels intermediate said cradle wheels at the bow and stern are raised an appropriate intermediate distance. 11. The improvement of claim 6 wherein the means for raising said cradle rails are programmed to raise cradle wheels at a bow higher than cradle wheels at a stern of the boat at launching. 12. The improvement of claim 1 wherein the cradle wheels are automotive wheels and the tires are pneumatic. 13. In a boat trailer for hauling a tunnel hull speed boat having spaced sponsons with inner side walls and a substantially planar overhead between said sponsons, defining with said inner side walls, a tunnel, said trailer having a wheeled frame, a cradle, carried by said frame, on which said boat is seated, and means for tilting said cradle, the improvement comprising automotive wheels with pneumatic tires revolvably carried on stanchions mounted on said cradle inboard of said inner walls, said wheels being mounted inboard of said stanchions, the stanchions being hollow, one part being fixedly secured to the frame and another part being slidably mounted on said fixed part, and hydraulic means for raising said wheels having a cylinder at least partly enclosed in said fixed part of said stanchions and a piston connected to said sliding part for raising said wheels from a position at which said wheels are out of engagement with said overhead to a position at which said wheels engage said overhead of said tunnel, the means for raising said wheels being programmed to raise wheels at a bow higher than wheels at a stern of the boat at launching, and to raise said wheels at the stern higher during retrieval of the boat than during the launch of the boat, and to raise the wheels intermediate said wheels at the bow and stern an appropriate intermediate distance to permit the boat to roll easily from the trailer when released to do so, and to be easily mounted on said trailer from the water when the boat is afloat.
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