Method and apparatus for determining reference levels and...

Details Method and apparatus for determining reference levels and... Method and apparatus for determining reference levels and...

2007-04-17

2007-04-17

Fulton, Christopher W. (Department: 2859)

Geometrical instruments

Straight-line light ray type

Alignment device

C033S291000

Reexamination Certificate

active

11058707

ABSTRACT:
A method and apparatus are presented for a laser tool used for direct indication of a level surface. This embodiment may also be used to transfer a level elevation from one level surface to a neighboring surface. The device may also be used to indicate the degree of flatness of a surface by direct observation. An alternative embodiment can provide a direct indication of plumb surfaces.

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patent: 6804892 (2004-10-01), Yung et al.
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