Cover for trenches
US5179752A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1992 |
| Grant date | Jan 19, 1993 |
| Priority date | — |
| Expiry date | May 14, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03F5/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cover (1) for temporarily covering a trench, e.g. in a thoroughfare such as a road or footpath, by extending over, and resting on the ground on opposite sides respectively of the trench, the cover (1) being releasably engageable with other adjacent covers (1a and 1b) by means of male members (5 and 5b) mating with respective corresponding female members (6a and 6) in such a manner that when the covers (1, 1a and 1b) are engaged in a ground resting position to form an assembly (7) of covers, one cover (1b) of the assembly can be disengaged from the adjacent cover (1) only by moving the cover (1b) out of the general plane of the assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.