Rolling shutter bar
US4601953A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1985 |
| Grant date | Jul 22, 1986 |
| Priority date | — |
| Expiry date | Feb 27, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a hollow plastic rolling shutter slat coated on the weather side with a metal layer for reducing the heat transfer while retaining the resistance to bending the inner side of the building-side profile wall is also coated with a metal layer, a minimum spacing always being provided between the two metal layers to insure the thermal insulation. The metal layers have at least one surface reflecting thermal radiation or reducing thermal irradiation. For obtaining the necessary resistance to bending the inner transverse webs of the hollow plastic rolling shutter bar are formed in such a manner that they transmit the shear stresses occurring on bending.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.