ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,742,461, issued on Sept. 22, was assigned to The GSI Group LLC (Assumption, Ill.).
"Cantilever butterfly shutter door closer" was invented by Joshua Sander (Assumption, Ill.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A closing assembly for a butterfly shutter is biased to move a shutter door to a closed position. The closing assembly has a cable connecting to the shutter door, a spring, a bracket having a pivot arm and a spring mount arm extending from the pivot arm. The closing assembly has an asymmetric crank, where the spring is attached to a first portion of the asymmetric crank, a second portion of the asymmetric crank is attached to the pivot...