Title:
Racket frame
Document Type and Number:
Japanese Patent JP6005940
Kind Code:
B2
Abstract:
A racket frame 2 includes a head 4, a shaft 8, and a pair of throats 6 extending from the head 4 to the shaft 8. A flexural rigidity G 15 of the throats 6 in a low load range (from 5 kgf to 15 kgf) is equal to or greater than 600 kgf/mm but equal to or less than 900 kgf/mm. A flexural rigidity G 55 of the throats 6 in a high load range (from 45 kgf to 55 kgf) is equal to or greater than 900 kgf/mm but equal to or less than 1200 kgf/mm. A rigidity ratio (G 15 /G 55 ) of the flexural rigidity G 15 and the flexural rigidity G 55 is equal to or greater than 0.70 but equal to or less than 0.85.
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Inventors:
Yohske Yamamoto
Application Number:
JP2012004449A
Publication Date:
October 12, 2016
Filing Date:
January 12, 2012
Export Citation:
Assignee:
Dunlop Sports Co., Ltd.
International Classes:
A63B49/02; A63B49/03; A63B102/02
Domestic Patent References:
| JP2011015885A | ||||
| JP2007325862A | ||||
| JP62231682A | ||||
| JP2001204853A | ||||
| JP2003093548A | ||||
| JP2011024617A |
Other References:
喰いつきと反発性能を両立したテニスラケット スリクソン「REVO V」シリーズ新発売,株式会社ダンロップスポーツ,2012年 1月30日,URL,http://www.srigroup.co.jp/newsrelease/2012/srisp/2012_s08.html
Attorney, Agent or Firm:
Kengo Oka