Brushing – scrubbing – and general cleaning – Implements – Pipe – tube – or conduit cleaner
Patent
1990-12-17
1992-04-21
Roberts, Edward L.
Brushing, scrubbing, and general cleaning
Implements
Pipe, tube, or conduit cleaner
15 351, B08B 904
Patent
active
051054981
ABSTRACT:
Described herein is a device for cleaning a sewer of a kind which, under action of the flowing sewage, is carried along the sewer by the sewage with a velocity less than the average velocity of sewage flow and which comprises a hollow cleaning ball immersing into the sewage and rolling on the bed or ceiling of the sewer. The outer surface of the cleaning ball has protrusions, the outer surface of the protrusions lie on an imaginary spherical surface. For adapting the effective weight of the cleaning ball to different levels of sewage in the sewer, several water through holes are distributed on the spherical wall of the cleaning ball which open into a sewage space within the hollow cleaning ball at a wall surface on which filth guiding ribs are. The filth guiding ribs end close to the openings of the water through holes.
REFERENCES:
patent: 2478961 (1949-08-01), Wortham
patent: 2745231 (1956-05-01), Prince
patent: 4336074 (1982-06-01), Dinkelacker
Patent Abstracts of Japan, vol. 10, No. 345 (P-521) (2410), Nov. 28, 1986.
Max-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V.
Roberts Edward L.
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