Step support method for use in the manufacturing of straight or curved stairs
US6968655B2 · kind B2 · utility
1Cited by
33References
2Claims
0Family size
Inventor
Key dates
| Filing date | Apr 16, 2004 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Apr 16, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F2011/0209
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A step support method for use in the manufacturing of straight or curved stairs comprising a plurality of cutouts and a plurality of formed flanges in a contiguous sheet of metal creating a surface for stair treads and risers to be attached. The design of which allows the embodiment to serve structurally as being load bearing. With the addition of slits in the tread support flange, the embodiment can be applied to the manufacturing of curved stairs as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.