Measuring and testing – Center of gravity; turning moment; metacentric height – Ball driving sporting implement
Reexamination Certificate
2007-10-16
2007-10-16
Noori, Max (Department: 2855)
Measuring and testing
Center of gravity; turning moment; metacentric height
Ball driving sporting implement
Reexamination Certificate
active
10411234
ABSTRACT:
Evaluation of the durability or the coefficient of restitution of a golf club head1is performed by measuring a response signal of an impact surface10of a golf club head1when imparting a vibration to the impact surface10, finding a value of the peak frequency of the first resonance frequency or the like located within a predetermined frequency range of the measured response signal, and finding the ratio of this peak frequency value with respect to a reference value. Further, control of the quality of the restitution characteristics in a initial state, or quality of the golf club head that deteriorates over time, is conducted by utilizing the evaluation results. The golf club head1is provided with a label12for displaying the peak frequency measured immediately after manufacture as an initial value. Further, in manufacturing a golf club, the quality of the golf club head immediately after manufacture is controlled by the peak frequency.
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Japanese Decision of Refusal dated Sep. 12, 2006 in Japanese Patent Application No. 2002-113073.
Ono Kazunori
Saegusa Hiroshi
Noori Max
The Yokohama Rubber Co. Ltd.
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