ALEXANDRIA, Va., June 17 -- United States Patent no. 12,311,818, issued on May 27, was assigned to THE TORO COMPANY (Bloomington, Minn.).

"Grounds maintenance vehicle with adjustable suspension system" was invented by Dale A. Stover (Plymouth, Minn.) and Jason J. Henry (Hudson, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Suspension systems and grounds maintenance vehicles incorporating the same are disclosed. The suspension system may include biasing elements or springs that may be adjusted to vary the preload and thus change the spring and dampening characteristics of the suspension system. In some embodiments, the system may include an adjustment mechanism that permits simultaneous adjustment of tw...