Brushing – scrubbing – and general cleaning – Implements – Pipe – tube – or conduit cleaner
Patent
1988-02-10
1989-10-31
Roberts, Edward L.
Brushing, scrubbing, and general cleaning
Implements
Pipe, tube, or conduit cleaner
1523601, 29 81G, B08B 904
Patent
active
048767611
ABSTRACT:
A pin for a sweeper used to scrape scale off the inner wall of a pipe has a shaft portion, an anchoring portion at the lower end of the shaft portion for being driven into the sweeper body to prevent the pin from falling out, and a head portion at the upper end of the shaft portion. The head portion has a plurality of spaced, generally pyramidal projections for contacting and scraping off scale. The projections are arranged in such a manner that the tip portions thereof do not overlap one another when the head portion is viewed from the side. The head portion may alternatively include a plurality of stacked plate-shaped bodies each of which has corner portions. The plate-shaped bodies are stacked on one another and are successively angular offset in the same direction in such a manner that equal angles are formed between corresponding corner portions of mutually adjacent ones of the plate-shaped bodies.
REFERENCES:
patent: 1727915 (1929-09-01), Thomson
patent: 4244073 (1981-01-01), Sagawa
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