Illuminated level
US7900366B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 2009 |
| Grant date | Mar 8, 2011 |
| Priority date | — |
| Expiry date | Apr 1, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C9/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A longitudinally-elongated, hand-held level includes a body having a reference surface, a longitudinally-extending corner adjacent the reference surface, and a plurality of bubble vials for indicating an orientation of the reference surface. One or more battery-powered lights (e.g., LEDs) create a longitudinally elongated light emitting region along the corner to illuminate a longitudinally-elongated area that is adjacent to the level for use in low-light environments. The light(s) may project light through a light guide and/or light diffuser(s) extending along the corner to disperse light along the longitudinal extent of the level. The light(s) may also illuminate the corner(s) of the level and/or the bubble vials to enhance use in low-light environments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.