Metal working – Scale remover or preventor – Scraper or scalper
Patent
1986-09-08
1988-06-14
Goldberg, Howard N.
Metal working
Scale remover or preventor
Scraper or scalper
1510404, 29 81F, 29 81G, 30381, 83831, B23D 7900
Patent
active
047502495
ABSTRACT:
A pipe scraping tool for cleaning scale and other deposits from the exterior surfaces of pipes. The tool includes a plurality of inverted "U"-shaped scraper members each of which is carried by one of a series of interconnected hinged links, each link (preferably rectangular in shape) having a straight edge at each end thereof. These straight edges and the type of links used avoid excessive lateral movement of the links. The inverted "U"-shape of the scraper members provides relatively closely spaced cutting edges. The substantial length of the legs of the inverted "U"s helps avoid clogging of the tool by providing substantial exit spaces, for scale and other debris removed from the pipe exterior surfaces, between the cutting edges and the structure supporting those cutting edges, as well as between the cutting edges and the hinges that interconnect the links that carry the scraper members. Satisfactory, improved and preferred ratios of the depth and width of the spaces between adjacent cutting edges of a given scraper member of the tool are specified, as well as a similar series of ratios of the depth and width of the spaces below the hinges of the tool.
REFERENCES:
patent: 834251 (1906-10-01), Bailey
patent: 1283070 (1918-10-01), Callender
patent: 2583243 (1952-01-01), Tweedie
patent: 2855724 (1958-10-01), Graves
patent: 3214824 (1965-11-01), Brown
patent: 4218820 (1980-08-01), Cleva
patent: 4530679 (1985-07-01), Reynolds
Cuda Irene
Goldberg Howard N.
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