Step module for use in constructing stairways
US5014475A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1989 |
| Grant date | May 14, 1991 |
| Priority date | — |
| Expiry date | Dec 21, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F11/035
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A step module is provided for use in constructing stairways. Each step module includes a tread portion and a riser portion connected at a nosing so that a plurality of modules may be secured adjacently in stepwise fashion to create a stairway. A shoulder member attaches to the riser portion of one module along the front riser surface parallel to the nosing and thus forms a tread seat for attachment of the distal tread edge of a lower module. When connected, a channel is formed which may be enclosed and filled with a filler material such as an acoustical damping material. The cover may be a wing projecting forwardly of the riser portion and underlying the tread portion of the lower module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.