Apparatus for determining a representative spring constant of a golf club head
US6505498B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 10, 2001 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | May 10, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
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 (tz) and the representative spring constant (Kc) of the clubhead is calculated using the equation:Kc=0.2971×tz−2.15570.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.