Laser leveling apparatus

Optics: measuring and testing – Angle measuring or angular axial alignment – Photodetection of inclination from level or vertical

Reexamination Certificate

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Details

C356S004010, C356S005010, C033S285000, C033S290000

Reexamination Certificate

active

07099000

ABSTRACT:
A laser levelling apparatus includes a platform, a base assembly, a body assembly, a head assembly and a laser assembly. The body assembly is rotatable about a body axis relative to the base assembly, the head assembly is rotatably supported by the body and rotatable about a head assembly axis transverse to the body axis and the laser assembly supported by the head assembly and rotatable about a laser assembly axis which is transverse the head assembly axis. The laser assembly has a laser diode and focusing elements and laser collimator the laser beam with the laser assembly. The head assembly is mounted between a first shaft end mounted at a first position of the body and a second shaft end mounted at the second position of the body opposed to the first position. A head assembly collimator is used to adjust the axis of rotation of the head assembly. A base assembly leveller is used to adjust the level of the base relative to the platform in at least two transverse directions. The base leveller, laser collimator and head assembly collimator together and head assembly collimator together provide for collimator of the beam along three orthogonal axes.

REFERENCES:
patent: 3269254 (1966-08-01), Kern et al.
patent: 4988192 (1991-01-01), Knittel
patent: 5784155 (1998-07-01), Ohtomo et al.
patent: 5790248 (1998-08-01), Ammann
patent: 196 51 250 (1997-03-01), None
patent: 197 57 461 (1999-06-01), None
patent: 19757461 (1999-06-01), None
patent: 299 14 639 (2000-05-01), None
patent: WO 00/14480 (2000-03-01), None
patent: WO 0014480 (2000-04-01), None

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