Movable bases for softball and baseball playing fields
US4976430A · kind A · utility
11Cited by
3References
5Claims
0Family size
Inventor
Key dates
| Filing date | Aug 7, 1989 |
| Grant date | Dec 11, 1990 |
| Priority date | — |
| Expiry date | Aug 7, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B69/0013
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
Bases for baseball and softball are improved to permit yielding when struck by sliding players. The bases are provided with a slot extending diagonally across the lower surface thereof. A slide member is slidably received in the slot to allow the bases to yield when contacted by a player. Spring elements are attached to the slide member and the base to cause the slide member to return to a normal at rest position of the base after being moved as a result of contact by a player.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.