Tennis ball tester
US5291774A · kind A · utility
12Cited by
2References
1Claims
0Family size
Inventor
Key dates
| Filing date | Apr 14, 1993 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Apr 14, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0605
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A means of testing used tennis balls by inserting them between a compression arm with a pressure point midway of the ball and a base with backstop which also engages the ball. The weighted compression arm is allowed to fall on the ball and a reading is obtained at the forward end of the tester to determine if the ball is playable, practicable or should be discarded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.