2014-6-20 · Double or dual rams normally include four rams, in pairs of two each, on opposite sides of the bowl about 180° apart,Small Jaw Crusher Manufacturer In India, such as shown in U.S. Pat. No. 3,570,774 issued Mar. 16, 1971 and U.S. Pat. No. 3,396,915, issued Aug. 13, 1968. An arrangement for dual rams has been shown in FIG. 4.