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US 4,798,549 AGranted
Surfboard and method of making same
OwnerMark D. Hirschinventor
Life of this patent
Estimating the term…
Abstract
A surfboard body is built around a hollow stringer which is used for the injection of a lightweight foam into a mold and for providing the support for the lightweight board. One embodiment includes a hard lightweight shell covering the body. Another embodiment includes an air bag built around a stringer.
Claims20
A surfboard comprising:
- an elongated stringer having a forward end, a rear end, and upper and lower surfaces curved generally to the longitudinal profile of a surfboard;
- a passage formed into and extending along substantially the length of said stringer;
- outlet ports spaced along said stringer and communicating with said passage;
- a fin box formed in said stringer at the rear end thereof and communicating with said passage;
- said passage, said ports, and said fin box being constructed and arranged for the introduction of at least one of foam and steam therethrough for introduction into a space adjacent said stringer;
- and
- a three dimensional body formed around said stringer and having top and bottom outer surfaces defining a surfboard configuration.
4 more elements
A surfboard according to clalm 3 wherein:
- said foam body is formed by a process of foaming in said shell.
A surfboard comprising:
- an elongated stringer having a forward end, a rear end, and upper and lower surfaces curved generally to the longitudinal profile of a surfboard;
- a passage formed into and extending along substantially the length of said stringer;
- outlet ports spaced along said stringer and communicating with said passage;
- a fin box formed in said stringer at the rear end thereof and communicating with said passage;
- a three dimensional body formed around said stringer and having top and bottom outer surfaces defining a surfboard configuration;
- and
- said body is an air bag and includes a plurality of sleeves for receiving said stringer which includes arms that extend outward from opposite sides thereof.
4 more elements
A surfboard comprising:
- an elongated stringer having a forward end, a rear end, and upper and lower surfaces curved generally to the longitudinal profile of a surfboard;
- a passage formed into and extending along substantially the length of said stringer;
- outlet ports spaced along said stringer and communicating with said passage;
- a fin box formed in said stringer at the rear end thereof and communicating with said passage;
- and
- said stringer includes means defining a pair of parallel upper and lower passages, one of said passages having ports for injecting foam pellets into said mold and the other passage having ports for injecting steam into said mold, both of said passages accessible from said fin box.
3 more elements
A surfboard comprising:
- an elongated box-like stringer having a forward end, a rear end, and upper and lower surfaces curved generally to the longitudinal profile of a surfboard;
- an upper passage and a lower passage extending along substantially the length of said stringer;
- outlet ports spaced along said stringer and communicating with said passages;
- a fin box formed in said stringer at the rear end thereof and communicating with said passages;
- and
- a three dimensional foam body formed around said stringer and having top and bottom outer surfaces defining a surfboard configuration.
3 more elements
A surfboard for riding waves in a body of water comprising:
- an elongated box-like stringer having a forward end, a rear end, upper and lower surfaces, and curved generally to the longitudinal profile of a surfboard;
- an upper passage and a lower passage extending along substantially the length of said stringer;
- outlet ports spaced along said stringer and communicating with said passages;
- a fin box formed in said stringer at the rear end thereof and communicating with said passages;
- and
- a three dimensional foam body formed around said stringer and having top and bottom outer surfaces defining a surfboard configuration.
3 more elements
Dependencies are inferred from the claim text.