Title:
ゴルフボール
Document Type and Number:
Japanese Patent JP5707689
Kind Code:
B2
Abstract:
The present invention provides a golf ball composed of a core and a cover having an outside surface on which are formed a plurality of dimples. Letting BV and CV be the initial velocity (m/s) of, respectively, the ball and the core as measured by a method using an initial velocity measuring apparatus of the same type as a USGA drum rotation-type initial velocity instrument and letting BE and CE be the deflection (mm) of, respectively, the ball and the core when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf), the ball initial velocity BV is from 70.0 to 76.0 m/s and the ball satisfies the formula 0≰(CV−BV)−(CE−BE)≰2. The golf ball of the invention has a flight distance that can be reduced compared with official golf balls currently in use, yet has the same good feel on impact and excellent controllability, scuff resistance and durability to repeated impact as a game ball.
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Inventors:
Junji Umezawa
Application Number:
JP2009240257A
Publication Date:
April 30, 2015
Filing Date:
October 19, 2009
Export Citation:
Assignee:
Bridgestone Sports Co., Ltd.
International Classes:
A63B37/00
Domestic Patent References:
| JP9271538A | ||||
| JP2008043748A | ||||
| JP2007301357A | ||||
| JP2004168977A |
Attorney, Agent or Firm:
Takashi Kojima
Saori Shigematsu
Katsunari Kobayashi
Takeshi Ishikawa
Saori Shigematsu
Katsunari Kobayashi
Takeshi Ishikawa