Pipeline pig

Details Pipeline pig Pipeline pig

1992-01-30

1993-11-30

Roberts, Edward L.

Brushing, scrubbing, and general cleaning

Implements

Pipe, tube, or conduit cleaner

B08B 904

Patent

active

052653021

ABSTRACT:
A pipeline pig has hollow flared ends and a central portion of smaller radial dimension than adjacent parts of the pig. Detachable appendages extend radially outward from the pig in circumferential rows. At least one row of appendages is in the central portion and the appendages extend radially outward less than the other rows of appendages. The appendages are threaded into sleeves having anchored bases. The row of appendages that extends radially outward by a smaller amount than the other appendages is subjected to reduced wear, but when the pig encounters resistance, the central part of the pig extends outward bringing the appendages into contact with the interior of the pipeline.

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patent: 4825498 (1989-05-01), Rankin
patent: 4876761 (1989-10-01), Sagawa
patent: 5035021 (1991-07-01), Le Devehat

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