Measuring devices for bores and ducts

Details Measuring devices for bores and ducts Measuring devices for bores and ducts

1975-05-07

1977-01-04

Queisser, Richard C.

Measuring and testing

Miscellaneous

73 379, 73 405R, G01B 500, G01M 302

Patent

active

040006557

ABSTRACT:
A pipeline pig for locating constrictions or irregularities on the inner surface of a pipeline consists of a fluid-filled envelope, such as a rubber or rubberlike spherical or toroidal ball, arranged to be a close fit within the pipeline, and means for sensing pressure variations within the envelope. The distance travelled along the pipeline by the pig may be measured by means of a contact wheel running on the pipeline surface and provided with a revolution counter.

REFERENCES:
patent: 2192155 (1940-02-01), Schuldt
patent: 2428326 (1947-09-01), Fay
patent: 3132506 (1964-05-01), Pritcheit
patent: 3782171 (1974-01-01), Watt
patent: 3817086 (1974-06-01), Dorgebray

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