초록 ▼

A surf craft such as a surfboard or windsurfer comprising a planing plank (15) forming the complete lower surface (14) of the craft and a stiffening spine (11) upstanding from and extending substantially the length of the planing plank (15). The spine (11) being integral with the planing plank (15)

A surf craft such as a surfboard or windsurfer comprising a planing plank (15) forming the complete lower surface (14) of the craft and a stiffening spine (11) upstanding from and extending substantially the length of the planing plank (15). The spine (11) being integral with the planing plank (15) to form a structural unit with the planing plank projecting laterally from either side of the central spine. These lateral projections (31) of the planing plank (15) being independently resiliently deflectable in use relative to the central stiffening spine (11). Filler pads (35) on either side of the spine rest on and secured to the planing plank (15) to form with the spine a platform for a rider of the craft to stand and move about on when the craft is in use. The filler pads (35) being resiliently flexible with the planing plank.

대표청구항 ▼

A surf craft comprising a planing plank forming the complete lower surface of the craft, a central stiffening spine constructed to have a maximum strength against bending in the direction normal to the planning plank at a location spaced from each end of the craft and such that said strength decreas

A surf craft comprising a planing plank forming the complete lower surface of the craft, a central stiffening spine constructed to have a maximum strength against bending in the direction normal to the planning plank at a location spaced from each end of the craft and such that said strength decreases from said maximum toward each end of the craft, said spine upstanding from and extending substantially the length of the planning plank, said spine being integral with the planing plank to form a structural unit with the planing plank projecting laterally from either side of the central spine, said lateral projections of the planing plank being independently resiliently deflectable in use relative to the central stiffening spine, and filler pads on either side of the spine resting on the planing plank and forming with the spine a platform for a rider of the craft to stand and move about on, said filler pads being resiliently flexible with the planing plank.