ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,560,087, issued on Feb. 24, was assigned to BERGTEAMET AB (Boliden, Sweden).
"Method, arrangement and machine for full face reaming" was invented by Magnus Bergkvist (Boliden, Sweden).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method, an arrangement and a machine for powering holes in mountains through so-called full face reaming. According to the method according to the invention a plurality of cutterheads (20:1-20:n) independently of each other are displaceably moveably accommodated in a drill head (11) by operation of a linear drive arrangement (22:1-22:n) for each cutterhead (20:1-20:n), and which cutterheads from a condition retracted in the d...