Stair bracket
US4819391A · kind A · utility
20Cited by
7References
11Claims
0Family size
Inventors
Key dates
| Filing date | Apr 18, 1988 |
| Grant date | Apr 11, 1989 |
| Priority date | — |
| Expiry date | Apr 18, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F11/1041
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A stair bracket for constructing a staircase is formed from a single strip of sheet metal. One edge of the strip at one end and is upturned to form a flange having a length at least equal to the depth of a stair tread, and the same edge at the other end is downturned into a channel having a length at least equal to the height of a riser, the channel and flange meeting in the middle of the strip. In use the strip is bent at a right angle in the middle at the juncture point with the flange being on the inside of the angle and the channel being on the outside.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.