Eaton Corporation, 3675 Patterson Ave SE, Grand Rapids, MI 49512, US

Founded in 1993, Hydraulic Systems Division, also known as HSD, is one of the leading companies that provides integrated hydraulic systems in the United States. The company services the aerospace and derivative markets. It manufactures hydro-mechanical and electro-mechanical subsystems and components. Hydraulic Systems Division has designed and certified more than five civil aircraft hydraulic systems for business and regional jets. The company also produces hydraulic axial piston pumps and motors, power transfer and supply units, electro hydraulic power modules, and thrust-reverser and landing gear actuators. It also provides electrohydrostatic and electromechanical actuation power modules, hydraulic, accumulators, reservoirs, filter modules and valve packs. Hydraulic Systems Division maintains a more than 170,000 square-foot facility. Located in Kalamazoo, Mich., the company is a part of Parker Hannifin Corporation.