Collapsible marker cone
US5566638A · kind A · utility
20Cited by
8References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 13, 1995 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Oct 13, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01F9/688
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A collapsible marker cone for use with sporting events, such as in-line skating, comprising a base and a conical portion. The conical portion is attached to the base along a vertical axis and includes weakened regions such as vertically disposed slots which allow the conical portion to easily collapse, along the vertical axis, when a predetermined force, such as the weight of a falling person, is applied to the marker cone along the vertical axis. The weakened regions allow the conical portion to collapse prior to injuring the falling person.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.