ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,605, issued on June 17, was assigned to WWT North America Holdings Inc. (Houston).
"Eccentric linkage gripper" was invented by Rudolph Ernst Krueger V (Aliso Viejo, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A gripper mechanism for a downhole tool is disclosed that includes an eccentric linkage mechanism. In operation, an axial force generated by a power section of the gripper expands the linkage mechanism, which applies a radial force to the interior surface of a wellbore or passage. A sliding portion allows the gripper to slide along a surface of the formation in response to the radial force applied to the interior surface of the wellbo...