Flexible surfboard

Claim 2

A surfboard comprising: an elongated substantially oval deck structure having upper and lower broad surfaces and composed at least in part of balsa wood having the grain perpendicular to said broad surfaces and enclosed in a hardened layer of fiberglass-containing synthetic resin; and a generally flat stabilizer extending downwardly from said lower broad surface at one end of said deck structure and secured thereto, said stabilizer comprising two mirror symmetrical halves formed from sheet balsa having the grain perpendicular to a broad surface of each of said halves and parallel to said lower broad surface, said halves being joined at the broad surfaces thereof by a coating of synthetic resin laminated therebetween.

Claim 3

A surfboard as defined in claim 1 wherein said deck structure comprises: an elongated, substantially oval bottom deck; an elongated, substantially oval top deck slightly smaller than said bottom deck and spaced from said bottom deck within the outline thereof, both of said decks being made of sheet balsa having the grain perpendicular to a broad surface thereof and a coating of synthetic resin laminated to said surface; spacing means between said bottom deck and said top deck for holding said decks apart; at least one rail sheet spanning between the peripheral edge of said top deck and the peripheral edge of said bottom deck, said spacing means comprising a spine extending longitudinally over at least a portion of said surfboard, said spine being made of sheet balsa having the grain perpendicular to the broad surfaces thereof and parallel to said top and bottom decks and a coating of synthetic resin laminated to the latter surfaces; and ribs between said spine and the periphery of said surfboard and extending over at least a portion of the distance therebetween, said ribs being made of sheet balsa having the grain perpendicular to the broad surfaces thereof and parallel to said top and bottom decks and a coating of synthetic resin laminated to the latter surfaces.--

Claim 4

The surfboard defined in claim 2 wherein said rail sheet is made of sheet balsa having the grain perpendicular to a broad surface thereof, said rail sheet forming an angle with said top and bottom decks, the latter broad surface having a coating of synthetic resin laminated thereto.

Claim 5

The surfboard defined in claim 3, wherein said rail sheet, said spine, and said ribs are formed with a plurality of spaced cuts along their respective upper and lower edges, said cuts being arranged at an angle to said upper and lower edges.

Claim 6

The surfboard defined in claim 3 wherein said rail sheet comprises two spectrally identical halves, each extending along half the periphery of said edge of said top and bottom decks.

Claim 7

The surfboard defined in claim 5, wherein the synthetic resin laminated to said respective surfaces of said top and bottom decks, said rail sheets, said spine, and said ribs includes fiber-glass sheets.