Track system for toy vehicles
US4726515A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1987 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | Feb 25, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S104/01
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A track system for toy vehicles contains straight and curved track pieces at the end of which are reference points that coincide with symmetry points of a track grid having a track module, M, which is a multiple of a building module, m, of a base plate for mounting the track pieces. The length of the straight track pieces which are disposed either parallel to or diagonally with respect to the track grid are a multiple of or .sqroot.2 times a multiple of the track module, M. The curved track pieces are composed of a longer arcuate segment and a shorter straight segment. The center of the arcuate segment is deplaced with respect to the center of an arc, whose center is a symmetry point of the track grid and whose two radii define an angular range of the curved track piece. The center of the arcuate segment is defined by the intersection of an angle bisector of the tangents (T) of the reference points on the ends of the curved track piece and one of the two radii.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.