Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
Patent
1981-07-31
1983-11-08
Oechsle, Anton O.
Amusement devices: games
Aerial projectile game; game element or accessory therefor...
Target
264 453, 264 466, 264 54, 273DIG5, A63B 4910
Patent
active
044138229
ABSTRACT:
A tubular frame structure adapted for use as a tennis racket which includes an elastic polymer core which is bonded to and surrounded by a rigid shell of graphite composite. The elastic polymer core is a flexible vinyl foam prepared from plasticized polyvinyl chloride in which a suitable blowing agent is dispersed. A method for preparing the racket structure is disclosed.
The elastic polymer core provides a particularly desirable core material which does not degrade or breakdown during prolonged use and provides enhanced racket shock and vibration absorption, and, most importantly, the means to obtain the desirable variable density characteristics at the desired locations within the structure of racquet without a corresponding reduction in structural capability.
REFERENCES:
patent: 3373123 (1968-03-01), Brice
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patent: 4061520 (1977-12-01), Cecka et al.
patent: 4070020 (1978-01-01), Dano
patent: 4070021 (1978-01-01), Cecka et al.
patent: 4114880 (1978-09-01), Cecka
patent: 4294787 (1981-10-01), Lo
Fernandez David
Fernandez Helena J.
American Sports Equipment
Oechsle Anton O.
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