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Golf club and method of designing same

  • US 4,928,965 A
  • Filed: 04/14/1988
  • Issued: 05/29/1990
  • Est. Priority Date: 07/10/1984
  • Status: Expired due to Term
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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