Brushing – scrubbing – and general cleaning – Implements – Pipe – tube – or conduit cleaner
Patent
1996-03-12
1997-05-06
Scherbel, David
Brushing, scrubbing, and general cleaning
Implements
Pipe, tube, or conduit cleaner
B08B 902
Patent
active
056259174
ABSTRACT:
A pipeline pig having an elongate generally cylindrical bullet-shaped body formed of resilient foamed material having a rear end and a nose portion with a resilient rear seal cup secured to the rear end and a resilient front seal cup secured to its forward end near the nose portion. The resilient seal cups have apertures through their central portions and a circumferential rearward facing peripheral lip configured to engage the inner wall of the pipeline. The propelling fluid pressure is transmitted to the rear cup lip to engage it in sealing relation on the inner wall of the pipeline and passes through the rear cup apertures and is propagated throughout the foam material of the body to radially expand the body and exert a radial force on the front cup lip to radially expand and firmly engage the front cup lip in sealing relation on the inner wall of the pipeline. A portion of the propelling fluid pressure propagated throughout the foam material of the body passes to the exterior of the body to exert a propelling force on the front cup lip downstream from the rear cup lip, and a portion of the propelling fluid pressure propagated throughout the foam material of the body passes through the front cup apertures and is propagated throughout the foam material of the nose portion to the exterior of the nose portion and increases turbulence in the pipeline in front of the pig.
REFERENCES:
patent: 3659305 (1972-05-01), Powers
patent: 4413370 (1983-11-01), Payne et al.
patent: 4509222 (1985-04-01), Knapp
patent: 4720884 (1988-01-01), Ralls
patent: 4767603 (1988-08-01), Byrd et al.
patent: 5127125 (1992-07-01), Skibowski
patent: 5384929 (1995-01-01), Smith
Roddy Kenneth A.
Scherbel David
Till Terrence R.
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