ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,411,506, issued on Sept. 9, was assigned to ASSA ABLOY Accessories and Door Controls Group Inc. (Monroe, N.C.).
"Door closer with power close" was invented by Dustin Lawhon (Lilesville, N.C.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A door closer may utilize a door closing device (e.g., spring) and a force adjustment device (e.g., a motor) in order to allow for manual door opening and assisted door closing. During operation, as a door is manually opened, the spring is loaded (e.g., compressed or tensioned) above its pre-loaded closed position state. Once manual opening is completed, the spring that is loaded during opening begins returning to the ...