Brushing – scrubbing – and general cleaning – Implements – Pipe – tube – or conduit cleaner
Reexamination Certificate
2008-02-08
2010-11-09
Barr, Michael (Department: 1711)
Brushing, scrubbing, and general cleaning
Implements
Pipe, tube, or conduit cleaner
C015S104050
Reexamination Certificate
active
07827646
ABSTRACT:
A pipeline pig—that moves by pressurized gas flow and provides for distribution of treating liquid subsisting in a lower portion of a pipeline—having a longitudinally extending nozzle located at a forward end of the pig, an array of helical-shaped louvers located on the discharge side of the nozzle and arranged circumferentially, and two perforated sealing elements that create a cavity that serves as a low pressure plenum. The louvers create a vortex effect and the perforated sealing elements allow vapor and liquid in front of the pig to be drawn into the cavity and discharged through the ports and back into the discharge of the nozzle. In this manner, liquid subsisting at a bottom portion of the pipeline is dispersed to achieve a complete 360° coating application of the interior cylindrical wall of the pipeline.
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International Search Report and Written Opinion corresponding to PCT/US09/31543; issued by the International Searching Authority (ISA/US) on Mar. 9, 2009; 9 pages.
Barr Michael
Chaudhry Saeed T
Gable & Gotwals
TDW Delaware Inc.
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