ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,093, issued on April 15.
"Method for attaching a tube to a workpiece" was invented by Paul Po Cheng (London, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of attaching a tube having a tube wall defining a tube channel therein to a workpiece having a workpiece wall. A workpiece opening defined by a workpiece opening wall surface is formed in the workpiece wall. A tube engagement surface is formed on the tube wall for engagement with the workpiece opening wall surface. A workpiece heated portion in the workpiece, and a tube heated portion in the tube, are heated in a non-oxidizing atmosphere by energized heating elements to a hot worki...