ALEXANDRIA, Va., July 9 -- United States Patent no. 12,355,393, issued on July 8, was assigned to NEXTRACKER LLC (Fremont, Calif.).
"Variable radius under module balanced bearing" was invented by Alexander W. Au (Oakland, Calif.) and Ricardo Delgado-Nanez (San Jose, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A solar tracker bearing and a solar tracker incorporating the bearing, the bearing including at least one rotatable part, the rotatable part including a notch for receiving a torque tube, a slot, formed in the rotatable part and extending below the notch, the slot defining an arc having multiple radii, at least one engagement member configured to be received in the slot, and at least one base ...