ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,969, issued on April 29, was assigned to Kerr Machine Co. (Sulphur, Okla.).
"Fluid end assembly" was invented by Kelcy Jake Foster (Sulphur, Okla.), Mark S. Nowell (Ardmore, Okla.), Brandon Scott Ayres (Ardmore, Okla.) and Christopher Todd Barnett (Stratford, Okla.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fluid end having its fluid flow bores sealed without threading a retaining nut into the walls of each bore. The fluid ends may be assembled using a plurality of different kits that each comprise a fluid end body, a component, a retainer element, and a fastening system. The retainer element holds the component within each of the bores formed ...