ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,769, issued on Dec. 2, was assigned to FCI Holdings Delaware LLC (Wilmington, Del.).
"Dolly for rockbolt" was invented by Jason Matthews (Smeaton Grange, Australia) and Matthew Holden (Smeaton Grange, Australia).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rock bolt dolly for connecting a self-drilling rock bolt to a rock bolting apparatus includes a drive shaft having a central bore and defining a proximal end and a distal end defining an engagement means for engagement with a corresponding engagement means located on the proximal end of the rock bolt. A sleeve is mounted over the distal end of the drive shaft and arranged to slide along and over...