Brushing – scrubbing – and general cleaning – Implements – Pipe – tube – or conduit cleaner
Patent
1974-01-16
1976-02-24
Roberts, Edward L.
Brushing, scrubbing, and general cleaning
Implements
Pipe, tube, or conduit cleaner
B08B 904
Patent
active
039395197
ABSTRACT:
A cleaning plug especially adapted for condenser tubes or the like and designed to be propelled through the tube by differential fluid pressure includes an elongated core body and a plurality of spaced scraper discs along the body. The discs have radial slits formed from adjacent the body to the outer periphery to define annular segments. The segments are flexible to readily deflect when the plug is placed in a confining tube and to give full peripheral scraping action. The discs are sufficiently larger in outside diameter than the inside of the tube and the slits are sufficiently narrow to cause the outer tips of the segments to touch each other during the cleaning operation. The segments are sufficiently flexible to snap past each other and overlap when the tube diameter is reduced. The inner portion of the slits form opening means for passage of propelling fluid and foreign matter and to dislodge foreign matter forward of the plug. An axial passage through the core body may also be provided for this purpose. Preferably seven or more discs are utilized for the most efficient cleaning of the tube. The disc segments are integrally molded with the core body and the entire plug is fabricated of high density polyethylene. Specific dimensional limitations for nominal 7/8 inch outside diameter tubes are given. Projection means may be provided to space tandem plugs and the slits may be offset in the longitudinal direction to increase agitation action between the discs and to improve forward motion producing positive pressure.
REFERENCES:
patent: 2276109 (1942-03-01), Smith
patent: 2972156 (1961-02-01), VerNooy
patent: 3047895 (1962-08-01), VerNooy
patent: 3619844 (1971-11-01), Collins et al.
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