US Patent Issued to Sandvik Mining and Construction Tools on April 7 for "Sub-assembly, rock drilling rig, and method of absorbing vibrations in drilling" (Swedish Inventor)

ALEXANDRIA, Va., April 7 -- United States Patent no. 12,595,707, issued on April 7, was assigned to Sandvik Mining and Construction Tools AB (Sandviken, Sweden).

"Sub-assembly, rock drilling rig, and method of absorbing vibrations in drilling" was invented by Vitthal Chavan (Sandviken, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sub-assembly, rock drilling rig and method of absorbing vibrations in rotary and DTH drilling. The sub-assembly is for transmitting torque and axial forces between a rotating head and a drilling tool. There is an axial floating arrangement for providing an allowed limited axial relative movement between coupling elements of the sub-assembly. The arrangement comprises seve...