Jonas woodhead and sons [india] ltd manufactures parabolic spring. This is an iso/ts 16949-2002 certified company. Parabolic spring is a spring that consists of one or two or more leaves. The leaves touch only in the middle, where they are fixed to the axle and at the outer ends, where they are fixed to the vehicle. Each leaf represents a complete spring in itself and will act as the same. This tapering is called parabolic and it means that every centimeter [or inch] the thickness of the leaf decreases in an amount that relates to the square function of its length.
