Retrofitting a fire hydrant with secondary valve
US7240688B2 · kind B2 · utility
11Cited by
34References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2006 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | Mar 2, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/5485
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention relates to methods and devices for retrofitting fire hydrants with additional structure for reducing the potential that those with ill intent can foul municipal water supplies by introducing toxins or other materials into fire hydrants. Various embodiments include a seat and elongated member for efficient and cost effective installation and cooperation with valves, which close off portions of the hydrant otherwise available for receipt of toxic or other materials when the fire hydrant nozzle cap is unscrewed and open.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.