Golf club and method of designing same
First Claim
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1. A golf club for providing an increased ball traveling distance comprising a club head having a mechanical impedance with a primary minimum value within a frequency range of 600 Hz to 1,600 Hz when measured by a vibrator method, said club head further having a spring constant of 7,000 kg/cm to 22,000 kg/cm.
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Abstract
A golf club comprising a club head having a mechanical impedance with a primary minimum value in a region of frequency in which the mechanical impedance of a ball to be struck takes a primary minimum value. Mechanical impedance is defined as the ratio of an external force applied to one point of the ball (or the club head) over the response speed of another point of the ball (or the head) when the force is applied.
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Citations
18 Claims
- 1. A golf club for providing an increased ball traveling distance comprising a club head having a mechanical impedance with a primary minimum value within a frequency range of 600 Hz to 1,600 Hz when measured by a vibrator method, said club head further having a spring constant of 7,000 kg/cm to 22,000 kg/cm.
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17. A golf club for providing an increased ball travelling distance comprising a club head having a primary natural frequency within a range of 600 Hz to 1,600 Hz.
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18. A method for designing a golf club with respect to a ball to increase ball travelling distance comprising the steps of:
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measuring mechanical impedance of the ball relative to varying frequency of mechanical vibration imparted thereto to determine a primary minimum value in the mechanical impedance of said ball; measuring mechanical impedance of a head of the golf club relative to varying frequency of mechanical vibration imparted thereto to determine a primary minimum value in the mechanical impedance of the club head; and designing said club head with the frequency at which said club head takes the primary minimum value of mechanical impedance to be within a range of 55%-145% of the frequency at which said ball takes the primary minimum value of mechanical impedance.
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Specification