Automatic on-off fire protection sprinkler
US5533576A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 1994 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Aug 1, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62C37/20
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A fire protection sprinkler is coupled to a pressurized fire extinguishing fluid supply line and positioned generally above a predetermined area to be protected against damage by fire. The sprinkler has a body with an inlet and at least one outlet, a divider defining bias and outlet chambers within the body, and a pilot valve assembly, forming an integral part of the body, is in communication with the bias chamber. The divider has a first "off" position substantially preventing fluid from exiting the outlet chamber and a second "on" position allowing fluid flow from the outlet chamber to be distributed over the area being protected. The pilot valve assembly includes a thermally responsive sensing element, e.g. a bimetal snap disc, disposed in a relatively horizontal plane generally below a main portion of the body for exposure to heat from all regions of the predetermined area to be protected by the sprinkler device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.