ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,740,509, issued on Sept. 22, was assigned to DEERE & COMPANY (Moline, Ill.).
"Quick change rotary mower blade system" was invented by Tanay Jhariya (Jabalpur, India), Andrew C. Smisek (Lindstrom, Minn.) and Chad C. Steen (Holly Springs, N.C.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A quick change rotary mower blade system includes a spindle having a vertical axis of rotation extending through a mower deck, and a ring shaped metal spring between the spindle and a retainer. The retainer may be turned less than 90 degrees on the vertical axis of rotation to compress the ring shaped metal spring sufficiently to clamp the mower blade. A plurality of d...