US2005209025A1PendingUtilityA1

Golf ball

Assignee: SUMITOMO RUBBER INDPriority: Mar 19, 2004Filed: Dec 20, 2004Published: Sep 22, 2005

Est. expiryMar 19, 2024(expired)· nominal 20-yr term from priority

Inventors:Masaya Tsunoda

A63B 37/0003A63B 37/0088A63B 2071/0625

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References

Claims

Abstract

There is provided a golf ball providing a larger coefficient of restitution and producing a smaller hitting sound, characterized in that it provides a natural frequency under a fixed-free boundary condition (Fx) ranging from 1000 Hz to 1200 Hz both inclusive, and a natural frequency under a free boundary condition (Ff) ranging from 2200 Hz to 3700 Hz both inclusive, where Ff/Fx preferably ranges from 1.8 to 3.4 both inclusive.

Claims

exact text as granted — not AI-modified

1 . A golf ball providing a natural frequency under a fixed-free boundary condition (Fx) ranging from 1000 Hz to 1200 Hz both inclusive and a natural frequency under a free boundary condition (Ff) ranging from 2200 Hz to 3700 Hz both inclusive.  
     
     
         2 . The golf ball according to  claim 1 , wherein a ratio (Ff/Fx) of the natural frequency under a free boundary condition (Ff) to the natural frequency under a fixed-free boundary condition (Fx) ranges from 1.8 to 3.4 both inclusive.  
     
     
         3 . A golf ball providing a natural frequency under a fixed-free boundary condition (Fx) ranging from 1050 Hz to 1200 Hz both inclusive and a natural frequency under a free boundary condition (Ff) ranging from 2200 Hz to 3500 Hz both inclusive.  
     
     
         4 . The golf ball according to  claim 1 , wherein a ratio (Ff/Fx) of the natural frequency under a free boundary condition (Ff) to the natural frequency under a fixed-free boundary condition (Fx) ranges from 1.8 to 3.1 both inclusive.

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