Racket with vibration damping yoke
AssigneeSumitomo Rubber Industries, Ltd.
InventorsKunio Niwa, Hiroyuki Takeuchi, Takeshi Ashino
Life of this patent
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Abstract
A frame body (2) is formed separately from a yoke (10) connecting right and left parts of the frame body (2) to each other. The yoke (10) and the frame body (2) are connected to each other by a mechanical connection means, with both ends of the yoke (10) in contact with the right and left parts of the frame body (2) in an area of not less than 10 cm2 (1.6 in2). A shear force generated when the racket frame (1) deforms is collectively applied to a connection surface of the frame body (2) and that of the yoke (10) to increase a vibration-damping performance of the racket frame (1).
Claims16
A racket frame comprising a frame body and a yoke connecting right and left parts of the frame body to each other;
- wherein the yoke and the frame body are connected by a mechanical connection means and/or an adhesive agent, with both ends of the yoke in contact with the right and left parts of the frame body in an area of not less than 10 cm2,
- the yoke has right and left connection auxiliary parts each extending from one end of a main part of the yoke that closes
- an opening of a string-stretched part of the frame body, each of the right and left connection auxiliary parts extending across a boundary between the string-stretched part and a throat part of the frame body;
- each of the right and left connection auxiliary parts of the yoke is extended to a shaft part along an inner surface of the throat part in such a way that a leading end of the right connection auxiliary part is continuous with that of the left connection auxiliary part to form an approximately hollow triangular space with the connection auxiliary part and the main part of the yoke.
A racket frame having a frame body and a yoke connecting right and left parts of the frame body to each other, wherein
- the yoke and the frame body are connected by a mechanical connection means and/or an adhesive agent, with both ends of the yoke in contact with the right and left parts of the frame body in an area of not less than 10 cm2,
- the yoke has right and left connection auxiliary parts
- each extending from one end of a main part of the yoke that closes
- an opening of a string-stretched part of the frame body, with each of the right and left connection auxiliary parts extending across a boundary between the string-stretched part and a throat part of the frame body;
- both ends of the main part of the yoke and a connection auxiliary part extending from both ends of the main part of the yoke are connected to an inner-surface side of the frame body by superimposing an outer surface of the connection auxiliary part and an inner surface of the frame body on each other or by fitting the connection auxiliary part on a fit-on portion formed on the inner surface of the frame body in correspondence to a configuration of the connection auxiliary part.
Dependencies are inferred from the claim text.