Apparatus for producing a horizontal foundation for a masonry wall
US6508006B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Sep 28, 2001 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Sep 28, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C15/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus is provided for marking grade stakes driven into the ground for the purpose of facilitating formation of a level string line to establish a horizontal foundation for the construction of a masonry wall. The apparatus includes a stake-engaging component having an attached retaining component capable of slidably securing a vertically moveable elongated positioning rod. Attached to the positioning rod is a rod-eye device capable of receiving a leveling beam from a distantly located laser transmitter, thereby producing a visual and/or audible signal which dictates the elevational distance of the positioning rod above the horizontal foundation. A marking guide at the bottom of the positioning rod enables a worker to mark the stake at the proper elevational distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.