Filament wound fiber reinforced thermoplastic frame for a game racquet
US5575875A · kind A · utility
28Cited by
21References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1994 |
| Grant date | Nov 19, 1996 |
| Priority date | — |
| Expiry date | Feb 24, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/5245
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A frame for a game racquet such as a tennis racquet is formed by helically winding a tow of filament material and thermoplastic material over an elongated mandrel to form a tube. The tube is positioned in a mold having the shape of a game racquet frame and auxiliary pieces for handle and yoke sections are added. This preform is heated to melt the thermoplastic while the interior of the tube is pressurized. The preform is then allowed to cool and harden to form the game racquet frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.