ALEXANDRIA, Va., March 19 -- United States Patent no. 12,251,811, issued on March 18, was assigned to Russell Mineral Equipment Pty Ltd. (Toowoomba, Australia).
"Linerbolt removal tool improvements" was invented by David Groves (Toowoomba, Australia) and Peter John Rubie (Toowoomba, Australia).
According to the abstract* released by the U.S. Patent & Trademark Office: "A linerbolt removal tool, including: a housing; a moil supported for reciprocating movement by the housing; an inertial body located within the housing; a gas charged accumulator extending from the inertial body away from the moil; a piston moveable within the inertial body between a striking position at which the piston strikes the moil and a retracted position, whereby fi...