Street ironwork
US8998528B2 · kind B2 · utility
1Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2012 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Jun 13, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D29/1481
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The street ironwork according to the invention includes a frame (4), a manhole cover (6), a hinge (10) for pivotably connecting the covering element relative to the frame between a closed position and an open position, the hinge including a frame knuckle (20) and a covering element knuckle (22).The street ironwork includes a locking element (40) attached to the covering element knuckle and suitable for preventing the covering element knuckle from being released from the frame knuckle in at least one of the open positions of the covering element relative to the frame or in the closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.