ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,409, issued on June 3, was assigned to Kerr Machine Co. (Sulphur, Okla.).
"Linear drive assembly" was invented by Kelcy Jake Foster (Sulphur, Okla.), Micheal Cole Thomas (Azle, Texas), Christopher Todd Barnett (Stratford, Okla.), Nicholas Son (Davis, Okla.) and John Keith (Ardmore, Okla.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pair of wear grooves for a linear drive assembly. One wear groove is disposed on a wear plate attached to a crosshead. This wear groove is on a front edge of the wear plate, and does not intersect any lubrication groove. Another wear groove is disposed circumferentially about an inner wall of a crosshead guide. Each of...