Apparatus for checking the internal diameter of pipelines

Details Apparatus for checking the internal diameter of pipelines Apparatus for checking the internal diameter of pipelines

1986-02-19

1987-03-24

Martin, Jr., William D.

Geometrical instruments

Gauge

Internal

33147K, 33178F, G01B 728

Patent

active

046514376

ABSTRACT:
Mounted on a carriage movable through a pipeline is a shaft which carries a wheel held against the inner surface of the pipeline. The shaft is arranged so that it can reciprocate transversely of the pipeline as the diameter of the latter varies, and a pen mounted on the shaft marks a line on a recording sheet which is secured to a drum mounted on the carriage and arranged to rotate as the latter travels through the pipeline.

REFERENCES:
patent: 2102080 (1937-12-01), Kinley
patent: 2980854 (1961-04-01), Dean et al.
patent: 3718978 (1973-03-01), Van Koeverin et al.
patent: 3755908 (1973-09-01), Ver Nooy

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