Swing velocity indicator
US4967596A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1989 |
| Grant date | Nov 6, 1990 |
| Priority date | — |
| Expiry date | Aug 23, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2220/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for indicating the peak tangential velocity of a swung sporting goods implement such as a tennis racquet, golf club, or baseball bat, comprises a tube having a longitudinal bore. A seismic mass is slideably disposed within the bore of the tube, and a spring operates to pull the seismic mass toward the proximal end of the tube. A reset mass is normally captured at the distal end of the tube but is selectively released to slide within the bore of the tube. A peak velocity indicator is slideably disposed within the bore of the tube between the seismic mass and the reset mass, the peak velocity indicator frictionally engaging the inner walls of the tube such that it is displaceable longitudinally within the bore of the tube by an applied force but maintains its position within the bore of the tube once the applied force is removed. When the apparatus is affixed to the club or racquet with the longitudinal bore aligned with the shaft of the implement, swinging the implement generates a centrifugal force which displaces the seismic mass. The displaced seismic mass pushes the peak velocity indicator ahead of it, and the peak velocity indicator remains lodged in its forwardmos…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.