Patent ID: 9662690
Date: 2017-05-30
CPC Classifications: B08B,F16L

Claim:
1. A pig assembly for servicing a multi-diameter functional line for conveying fluid, comprising: a. a central shaft having a first shaft end and a second shaft end; b. at least one cylindrical pig body coaxially mounted on the central shaft; c. a plurality of arms attached to the at least one pig body capable of moving between an extended position radiating from the at least one pig body and a retracted position within the at least one pig body; wherein each of the pluralities of arms comprises: d. at least one set of a plurality of scraper elements located along the central shaft and spaced a predetermined distance from the at least one cylindrical pig body, the at least one set of a plurality of scraper elements capable of rotating about the central shaft to move between an opened position and a collapsed position.