ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,973, issued on Sept. 23, was assigned to Halliburton Energy Services Inc. (Houston).

"Spring actuated axially locking shaft coupling for bi-directional loading" was invented by David McManus (Tulsa, Okla.), Steven Andrew Lovell (Tulsa, Okla.), Casey Laine Newport (Tulsa, Okla.) and Andre Joseph Bernier (Tulsa, Okla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An electrical submersible pump assembly comprising a first section and a second section with an outer housing and a drive shaft. A coupling assembly comprising a coupling, a first and a second locking keys, and a plunger assembly mechanically couples the first drive shaft to the second driv...