Walk-through type waterproof screen apparatus
US6070640A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1997 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Oct 22, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62C2/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A walk-through type fire-limiting screen arrangement separates an interior space of a building and prevents fire from propagating and assists refugees to escape from the fire. A non-combustible or fire-proof screen droops from a ceiling or a beam. At least one slit extends vertically down to a lower end of the screen to define a refugee path. A predetermined width of a closure flap is associated with the at least one slit for closing the slit with a predetermined overlap between the at least one slit and the closure flap. A main weight bar is horizontally fixed along the lower end of the screen except for the closure flap, and a sub-weight bar is horizontally fixed along the lower end of the closure flap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.