초록 ▼

A novel structural member, such as a tennis racket, and the method for making same, provides a high strength to weight ratio. The structural member of this invention consists of a fiberglass shell which surrounds a syntactic foam core. The fiberglass shell may be further selectively reinforced with

A novel structural member, such as a tennis racket, and the method for making same, provides a high strength to weight ratio. The structural member of this invention consists of a fiberglass shell which surrounds a syntactic foam core. The fiberglass shell may be further selectively reinforced with a ribbon which is formed from a high strength fiber such as boron fibers, graphite fibers, aramid fibers, etc. Because the structure of this invention incorporates a high strength to weight ratio it can be utilized in the manufacture of rackets of conventional and radical design. This invention relates to a structural member consisting of a tennis racket having a high strength to weight ratio.

대표청구항 ▼

In a racket frame having a head, throat and handle, an improved construction wherein said frame comprises a core consisting of a mixture of syntactic foam and a blowable non-syntactic foam; a fiberglass outer shell bonded to and substantially covering said core; and the racket frame further comprisi

In a racket frame having a head, throat and handle, an improved construction wherein said frame comprises a core consisting of a mixture of syntactic foam and a blowable non-syntactic foam; a fiberglass outer shell bonded to and substantially covering said core; and the racket frame further comprising high strength fiber material comprising a ribbon of graphite material woven together by aramid fibers located about at least a portion of said racket frame.