ALEXANDRIA, Va., March 3 -- United States Patent no. 12,565,947, issued on March 3, was assigned to Mestek Machinery Inc. (Westfield, Mass.).
"System and method for forming a full engagement male lock in a ductline" was invented by David Krivanek (Cedar Rapids, Iowa) and Timothy Aaron Coon (Lisbon, Iowa).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a method for producing a full engagement Pittsburgh male lock using specific cutting assemblies and protocols that reduce the amount of metal that is removed from the male portion of the corner notches in the duct. Forming of the male portion of the lock is done after the connecting flange forming has been completed as opposed to be...