Requirements to the leaf springs used for large-sized buses, trucks, light station wagons, etc. have been expanded to contribute to decrease weight, improve riding comfort, less vibration, etc. Sumihatsu is maintaining and improving, including saving manpower, facilities in the processes starting from design of leaf springs to quality control, to respond to those diversifying customers' needs, and to supply customers with high quality products.           Sumihatsu provides not only "Laminated leaf springs" but also "Trailing leaves" to be used together with air springs, and "Tapered leaf springs" materializing improved fatigue strength and weigth reduction. We are consistently developing new products.           Are used, together with air spring, as a part of suspension devices for motor coach, etc.             Are the most popular and traditional springs for suspension devices for railway cars and motor cars.         With less leaf springs decreasing friction among leaves, that achieves better riding feeling and more weight reduction.       (C)2003-2004 SUMIHATSU Co., Ltd All Right Reserved.