Badminton racket having novel throat connection
AssigneeYonex Kabushiki Kaisha
InventorMinoru Yoneyama
Life of this patent
Estimating the term…
Abstract
A badminton racket comprises a tubular shaft and an oval shaped frame internally connected to the shaft by a T-shaped joint including a pair of horizontal extensions and a vertical extension. The frame has opposite end portions with opened end faces, each of which is recessed at the lower side thereof in a semi-circular shape, and abutted against each other except at the recessed portions. The horizontal extensions of the joint are fitted in the end portions of the frame while the vertical extension is fitted in the upper end of the shaft. The junction area of the racket is coated with FRP layers to provide external connection.
Claims7
A badminton racket comprising:
- a tubular shaft having a hollow upper end;
- an oval-shaped tubular frame having opposite end portions, each said end portion being hollow with an opened end face and being formed smaller in dimension than the remaining portion of said frame, each said end face having at its lower side a recess of generally semi-circular shape, and said end faces being substantially abutted against each other except at said recesses;
- a joint of substantially T-shaped configuration having a pair of horizontal extensions and a vertical extension, said horizontal extensions being fixedly inserted into said end portions of said frame, and said vertical extension being fixedly inserted into said upper end of said shaft, thereby to internally connect said frame to said shaft;
- and
- fiber reinforced plastic layers coating the outer surface of said end portions of said frame and said upper end of said shaft to provide an external connection therebetween, said fiber reinforced plastic layers placed over said end portions of said frame resulting in a structure whose dimensions are substantially the same as said remaining portion of said frame so as to reduce air resistance.
Dependencies are inferred from the claim text.