Fire protection system and method using dual-purpose plumbing
US5720659A · kind A · utility
Inventor
Key dates
| Filing date | Dec 4, 1996 |
| Grant date | Feb 24, 1998 |
| Priority date | — |
| Expiry date | Dec 4, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F11/35
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A fire protection system and method supplies life-sustaining air to occupants taking refuge in the bathrooms of a building. Upon sensing a fire, the system automatically drains water from the building's hot water re-circulating loop. The loop drains rapidly due to the loop's automatic vent valve and re-circulating pump. Fresh air selected from among number of sources is then injected into the loop at a rather low pressure. The low pressure actuates a low pressure relief valve located at each bathroom sink. The valves automatically release the fresh air into each bathroom. If there is any exhaust vent in any of the bathrooms, it is equipped with an automatic damper that seals in the fresh air and prevents a back draft of smoke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.