Oscillating line travel pipe cleaning machine
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United States of America Patent
Stats
-
Mar 26, 1991
Grant Date -
N/A
app pub date -
May 1, 1989
filing date -
May 4, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A self-propelled pipe cleaning machine as disclosed for use in removal of deteriorated coatings, such as coal tar or tape, from pipelines and providing a degree of surface preparation suitable for recoating. The machine comprises a travelling frame for motion along the pipe and an oscillating carriage bearing a plurality of counter-rotating cylindrical cutting tools which are urged toward the pipe surface by constant-force pneumatic cylinders. Variation in the pressure of cutters against the pipe surface during oscillation of the cutter head is avoided by counterbalancing of the pivotally-mounted cutters and their associated drive means.
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