Automatic sprinkler head
US5010959A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 7, 1989 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Dec 7, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62C37/14
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An automatic sprinkler head comprising a body with a passageway for fire-extinguishing fluid, a frame extending from the body having a deflector plate opposite the passageway, a closure assembly (including a closure thimble) for closing the passageway, a thermally responsive glass bulb interposed between the closure assembly and the deflector plate, and a means to minimize lodgement of the closure assembly. The means to minimize lodgement of the closure assembly is interposed between the glass bulb and the closure thimble. The means to minimize lodgement is preferably an underground spiral spring and causes the closure assembly and any glass bulb fragments to tumble away from the axis of the passageway when the glass bulb fractures, thus minimizing the possibility of the closure assembly and glass bulb fragments becoming lodged against the deflector plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.