Self centering pipe axis laser guide and saddle

Details Self centering pipe axis laser guide and saddle Self centering pipe axis laser guide and saddle

1993-03-31

1994-11-01

Wirthlin, Alvin

Geometrical instruments

Straight-line light ray type

Alignment device

33520, 33529, 33354, 33373, 33645, 33DIG21, G01B 1127

Patent

active

053597818

ABSTRACT:
A self centering guide pipe axis laser guide is based on the use of three parallel links spaced 120 degrees apart which are engaged to be expanded or contracted. When expanded the links contact the inside diameter of the pipe which accordingly establishes the center axis of the pipe. The driving means for the links is a rotating screw mounted in a base centrally located with respect to the three links. In the front of the base is a laser module whose beam is aligned with the center axis of the pipe once the links contact the inner diameter of the pipe. Gauges mounted in a saddle on top of the pipe determine the proper slope once the center axis has been established. A calibrated scale on the guide can be used for determining both inner and outer diameters of the pipe. While the laser guide has been illustrated in determining the center line of pipes, it also has other uses such as aligning pillow blocks to a center line.

REFERENCES:
patent: 2323039 (1943-06-01), Hill
patent: 2541641 (1951-02-01), Dodson
patent: 3631601 (1972-01-01), McNulty
patent: 3707722 (1973-01-01), Cotter
patent: 3742581 (1973-07-01), Roodvoeis
patent: 4053238 (1977-10-01), George et al.
patent: 4155648 (1979-05-01), Ferguson
patent: 4357660 (1982-11-01), Hepp
patent: 4521968 (1985-06-01), Wiltermood et al.
patent: 4711037 (1987-12-01), Saadat

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