Pipeline pig

Details Pipeline pig Pipeline pig

1979-07-16

1981-01-06

Roberts, Edward L.

Brushing, scrubbing, and general cleaning

Implements

Pipe, tube, or conduit cleaner

B08B 904

Patent

active

042427711

ABSTRACT:
An improved pipeline pig is described, there being alternate embodiments. The illustrated and preferred embodiment is a pipeline pig made of a foamed polyolefin, bullet-shaped body having a cylindrical outer wall and a strip of heavier density resilient material across the outer cylindrical wall. A stud having the form of an inverted screw or bolt with a pointed tip is placed in the pig body and protrudes at the strip. The strip reinforces the stud and helps hold it in position. The stud preferably has an enlargement near the bottom portions thereof which enables the stud to be firmly anchored in position. The tip of the stud breaks hard deposits accumulated on the wall of a pipeline and enables the pipeline pig to sweep the deposits away.

REFERENCES:
patent: 3879790 (1975-04-01), Girard
patent: 4016620 (1977-04-01), Powers
patent: 4122575 (1978-10-01), Sagawa

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