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US 4,360,202 AGranted
CFRP or FRP made badminton racket frame
OwnerKun-Nan Loinventor
Life of this patent
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Abstract
A badminton racket frame comprising a ring frame, a throat, a shaft and a grip wherein said parts of the racket frame further comprising a layer made of carbon fiber reinforced plastics or fiber reinforced plastics having been soaked in a high polymer epoxy resin to form a prepreg sheet, and a solid independent foaming material as the core thereof. The present badminton racket frame is hot-pressing molded and has a shaft with the foaming material core therein having a diameter around one millimeter.
Claims1
A badminton racket frame comprising:
- a closed ring frame including a solid ring of foamed material and an outer jacket of fiber reinforced plastic, said outer jacket completely jacketing said ring;
- a shaft having a diameter of approximately one millimeter, said shaft including a solid rod of foamed material and an outer jacket of fiber reinforced plastic;
- a throat portion where said shaft is butted against and connected to the outer jacket of said ring frame in coplanar relationship and forms a seamless connection therewith;
- and
- a grip attached to said shaft;
- whereby said racket frame has a fiber reinforced plastic outer layer and a solid independent foamed material as the core thereof, said layer and core being closely and tightly constructed to form a seamless racket frame.
3 more elements
Dependencies are inferred from the claim text.