Baseball bat
US4323239A · kind A · utility
24Cited by
8References
7Claims
0Family size
Inventor
Key dates
| Filing date | Apr 8, 1980 |
| Grant date | Apr 6, 1982 |
| Priority date | — |
| Expiry date | Apr 8, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2102/18
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A hollow baseball bat made of a rigid material, such as a metal or a plastic and having a double structure comprising a hollow bat body and a reinforcing member disposed in the grip portion and the bending portion positioning the base end side of the bat. The reinforcing member has a trumpet-formed opening and forms a gap gradually increasing toward the opening portion between the inner wall of the bending portion of the bat. The outer circumferential surface of the reinforcing member and functions to reinforce the strength and elastic force of the bat when the bat is bent by impact of pitched ball.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.