Innovation. It's been a part of Kelley since 1953 when we invented the world's first counterbalanced dock leveler. Since then, Kelley innovation has produced a comprehensive line of hydraulic, air-powered and mechanical dock levelers, a variety of vehicle restraints incorporating safe, reliable, non-impact designs, integrated control systems, energy saving dock seals and shelters, HVLS Fans and a full array of ergonomic lift tables.