RIGID FROG FOR SWITCHES AND CROSSINGS Russian patent published in 2004 - IPC

FIELD: railway transport; permanent way. SUBSTANCE: proposed rigid frog is made with two wing rails and frog tongue in between. Tongue and wing rails form grooves arranged at acute angle relative to each other for free passing of wheel tire flange. Two wing rails and frog tongue rest on ribbed plate provided with vertical ribs. Feet of wing rails and foot of frog tongue are arranged between ribs. Wing rails and frog tongue are held on ribbed plate flexibly in vertical direction by means of vertically flexible clamps. Wing rails and frog tongue are disconnected from each other relative to their mass. Relative horizontal position of wing rails and frog tongue and, consequently, width of groove are provided by ribs between which feet of wing rails and frog tongue are held. EFFECT: improved operating characteristics of frog. 12 cl, 25 dwg