Plastic baseball bat and method of making the same
US4541629A · kind A · utility
12Cited by
7References
6Claims
0Family size
Inventor
Key dates
| Filing date | Jun 29, 1984 |
| Grant date | Sep 17, 1985 |
| Priority date | — |
| Expiry date | Jun 29, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S273/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection molded baseball bat with a core of thermoplastic plus a blowing agent and a solid skin of thermoplastic per se injected into the mold at one and the same time. The skin and core may be of the same or of different thermoplastic. The baseball bat is a unitary structure of superior strength and finish with the foamed core and solid skin fused together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.