ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,422,058, issued on Sept. 23.
"Method and apparatus for extraction of subterranean pipe" was invented by Andrew M. Braithwaite (Ennismore, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to machines and methods for subterranean pipe extraction. The pipe extractor is comprised of a first roller, a second roller radially opposed from the first roller, at least one motor configured to drive rotation of the first and second rollers in opposing directions, and a deflector positioned adjacent to the first and second rollers. The first roller and second roller are configured to receive a pipe between them, and the pipe is a...