Structural member having a high strength to weight ratio and met

Details Structural member having a high strength to weight ratio and met Structural member having a high strength to weight ratio and met

1980-03-10

1983-08-23

Pinkham, Richard C.

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Target

273DIG7, 273DIG8, 273DIG23, A63B 4910

Patent

active

043999921

ABSTRACT:
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.

REFERENCES:
patent: 3510392 (1970-05-01), D'Eustachio et al.
patent: 3585157 (1971-06-01), Beck
patent: 3690658 (1972-09-01), Howe
patent: 3707434 (1972-12-01), Stayner
patent: 3755037 (1973-08-01), Erwin et al.
patent: 3849350 (1974-11-01), Matsko
patent: 4061520 (1977-12-01), Cecka et al.
patent: 4133708 (1979-01-01), Tokuno
patent: 4135035 (1979-01-01), Branen et al.
patent: 4145047 (1979-03-01), Nagamoto et al.
patent: 4173670 (1979-11-01), Van Auken
patent: 4221382 (1980-09-01), Cooper et al.
"Modern Plastics"; Syntactic Foam by Davis and Johnson; Sep. 1967; pp. 215, 216, 219, 290.
"Archery"; Jun. 1974; pp. 10-13.

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