ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,123, issued on April 21, was assigned to FCI Holdings Delaware LLC (Wilmington, Del.).
"Dynamic rockbolt" was invented by Anthony Dodds (New South Wales, Australia).
According to the abstract* released by the U.S. Patent & Trademark Office: "A friction bolt includes a first tube having an internal diameter and defining a longitudinal split, the tube being radially expandable. The bolt has a first leading or distal end for insertion into a bore and a second or proximal end defining a head and further includes a second tube defining a longitudinal split and having an external diameter which is substantially the same as or larger than the internal diameter of the first tube. The se...