Portable laser device for alignment tasks
US5144487A · kind A · utility
106Cited by
15References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 3, 1991 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Sep 3, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S33/21
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A portable, battery powered, self-levelling alignment tool for simultaneously indicating level, plumb and square. A projection unit including a laser diode, a collimator, and an optical system is located in a projection unit which is pendulously suspended inside a housing. The optical system divides a collimated beam from the laser diode and the collimator into output beams having a generally perpendicular relationship with each other. The projection unit may be balanced such that at least one of the output beams is substantially level and other beams thus indicate plumb or square.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.