Apparatus for determining a representative spring constant of a golf club head
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United States of America Patent
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Jan 14, 2003
Issued Date -
N/A
app pub date -
May 10, 2001
filing date -
May 10, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
The apparatus employs a steel ball which is mounted in upstanding manner on a pin and a frame on which a golf club is pivotally mounted to freely pivot. The golf club is pivoted from a fixed position to impact the head of a golf club against the steel ball and an oscilloscope is used to record the acceleration and movement of the steel ball from its fixed point in response to the impact of the head and also calculates a velocity history of the steel ball. The time at which the calculated velocity is at a maximum is determined. Several impacts are made to obtain an average characteristics time (t.sub.z) and the representative spring constant (K.sub.c) of the clubhead is calculated using the equation: K.sub.c =0.2971.times.t.sub.z.sup.-2.15570.
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