Ball for ball game and method for manufacturing the same
US5752890A · kind A · utility
48Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1997 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | Sep 8, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2243/0025
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A ball for ball game comprising: a leather skin layer formed by sewing a plurality of leather panels by a thread, the leather skin layer having a spherical shape; and a bladder made of an elastomer having a hollow spherical shape, the bladder being accomodated in the leather skin layer, the bladder being provided with a valve for feeding air into the rubber bladder, the bladder being charged with air through the valve; wherein the thread is made of a self-shrink thread which is subjected to a shrinking treatment after sewing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.