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US 4,912,799 AGranted
Water main scraper
OwnerLewis E. Coleman, Jr.inventor
Life of this patent
Estimating the term…
Abstract
A scraper for use in repairing underground pipe breaks consisting of two parallel chains carrying transverse square scraper rods.
Claims8
A pipe scraping assembly, comprising:
- two spaced flexible elongated operator sections each having a handle at one end thereof, a scraper section interconnecting the other ends of the operator sections including two flexible parallel members, and a plurality of scraper members extending transverse to and fixed to the parallel members.
A pipe scraping assembly, comprising:
- a scraper section including two parallel chains each having a plurality of interconnecting links, said scraper section having a length at least half the circumference of the pipe to be scraped, a plurality of scrapers fixed to the links of the chains and extending generally transverse thereto, and two operator sections each extending from one end of the scraper section each having a handle at its distal end, whereby the scraper may be wrapped around a pipe and reciprocated in a plane transverse to the pipe direction to scrape foreign material on the surface of the pipe in preparation for break repair.
A pipe scraping assembly, comprising:
- a scraper section including two parallel chains each having a plurality of interconnecting links, said section having a length at least half the circumference of the pipe to be scraped, a plurality of scrapers fixed to the links of the chains and extending generally transverse thereto, two operator sections each extending from one end of the scraper section each having a handle at its distal end, whereby the scraper may be wrapped around a pipe and reciprocated in a plane transverse to the pipe direction to scrape foreign material on the surface of the pipe in preparation for break repair, the scrapers including a plurality of short square rods mounted alternately on the two scraper section chains and a plurality of long scraper rods each mounted on both of the scraper section chains, said scrapers being mounted on the scraper section chains so the rods form a point in a direction perpendicular to the links.
Dependencies are inferred from the claim text.