Stair stringer light set
US6685332B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Aug 29, 2002 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Aug 29, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light rope runs along the stringer of a stairway and is concealed by in-fill panels fitted into a groove on a frame rail running along the wall or stringer adjacent to the stairway. A light grille having a square frame and a patterned grille insert is seated along each tread adjacent to the next higher riser and is connected to the frame rail by a pair of adjustment arms. Translucent panels are mounted on the rear of the light grilles, allowing light to shine through them. Electrical circuitry turns the lights on when a user approaches the stairs and automatically turns the lights off after a predetermined time after the user has departed the area of the stairs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.