Portable flexible sealing device for grated openings
US9598851B2 · kind B2 · utility
2Cited by
65References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2014 |
| Grant date | Mar 21, 2017 |
| Priority date | — |
| Expiry date | Oct 6, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03F5/0411
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A lightweight watertight cover that is easily installed and positively secured in place, which provides a reliable seal to prevent flood water from entering openings such as subway ventilation shaft gratings and other porous openings that serve as entry point for flood water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.