Retrofitting a fire hydrant with a replacement hydrant body containing a secondary valve
US7775231B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2007 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Jan 18, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/88054
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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 replacement hydrant body having an enlarged diameter portion that can be installed to replace an existing hydrant body. The replacement hydrant body can include a secondary valve comprising a seat, biasing structure, and a restriction member to 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.