Reinforced roll-type shuttters
US5474118A · kind A · utility
Inventor
Key dates
| Filing date | May 31, 1994 |
| Grant date | Dec 12, 1995 |
| Priority date | — |
| Expiry date | May 31, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B9/15
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A roll-type shutter is formed of a number of horizontally elongated shutters, arranged one above the other, hingedly connected together along their adjacent edges for rolling the shutter up or extending it downwardly to form a panel. Each shutter is provided with an upper and lower cavity or channel within which a separate connector member is inserted. The connector members in each cavity are provided with generally L-shaped or hook-like internal portions which engage correspondingly shaped projections formed integrally within the interior of the respective channels so that the connectors are snugly fitted within and engaged against the interior walls of their channels. Each connector has an outer, that is, an upwardly or downwardly, respectively, arranged bent hook portion for engaging the corresponding hook portion of the next connector. The separate connectors extend substantially the full length of each of the slats and reinforce and rigidify the upper and lower edges of each of the slats. Since the slats are narrow, in effect, the shutter panel is divided with a series of horizontal lines of stiffening or reinforcement, which are relatively close together, formed by the connec…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.