US Patent Issued to Revolution Electric Motor on April 15 for "Slotless rotating electric machine" (Nevada, Washington Inventors)

ALEXANDRIA, Va., June 5 -- United States Patent no. 12,278,535, issued on April 15, was assigned to Revolution Electric Motor Co. (Reno, Nev.).

"Slotless rotating electric machine" was invented by Christopher Gabrys (Reno, Nev.) and Timothy Rodgers (Bainbridge Island, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A slotless rotating electric machine includes a rotor having multiple alternating polarity permanent magnets that drive magnetic flux across a magnetic airgap formed with a slotless ferromagnetic stator. The stator includes a helical backiron formed from a ferromagnetic strip wound edgewise and extending axially, and an adhesive film on the radial airgap surface of the backiron. Armature wind...