Constructional units for stepped structures
US3978628A · kind A · utility
14Cited by
9References
6Claims
0Family size
Inventor
Key dates
| Filing date | Aug 14, 1975 |
| Grant date | Sep 7, 1976 |
| Priority date | — |
| Expiry date | Aug 14, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F11/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A constructional element has an L-shaped body of molded metal or synthetic plastics material. The two arms of the body are provided with inclined stepped surfaces so that two adjacent elements can be locked together in one of a number of different relative positions. In this way a plurality of the elements can be used to build-up a staircase or variable height and extent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.