Racetrack structure
US5813351A · kind A · utility
18Cited by
10References
7Claims
0Family size
Inventor
Key dates
| Filing date | Feb 6, 1997 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Feb 6, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63H18/02
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A racetrack structure includes several track sections, the track sections are engaged with each other by hinges, therefore the racetrack can be folded for storage. Each of the track sections of the racetrack structure has PC boards provided at two ends thereof, thereby forming an electrical loop by utilizing the PC boards electrically connected to each other by the hinges. By such arrangement, oxidization of the contact points is low.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.