Patent ID: 7389593
Filing Date: 2008-06-24
Classification: G01C,Y10S

Abstract:
1. A marking and tracing tool comprising a casing having an elongate plane first bearing face and an elongate plane second bearing face that are mutually perpendicular and extend in respective longitudinal directions, having at least a first laser beam generator adapted to generate a first laser beam in the first longitudinal direction, and having one or more air levels adapted to check that a bearing face is horizontal, said tool further comprising retractable linear marking means adapted to be deployed in the second longitudinal direction, thereby extending the second bearing face, and to be retracted into the casing, by winding them onto a spool in the casing, wherein the retractable linear marking means consist of a tracing cord wound on the spool and associated with a container of tracing powder through which it passes between the spool and an exit orifice in the vicinity of the distal end of the second bearing face, and wherein the tool comprises two air levels with the first air level oriented for checking that the first bearing face is horizontal in the first longitudinal direction and the second air level oriented for checking that the first bearing face is horizontal in the transverse direction.