Patent ID: 6543728
Filing Date: 2003-04-08
Classification: E01B

Abstract:
A cross frog zone (10, 12) for switches and crossings, including a cross frog tip (14, 24) and, extending at both sides thereof, wing rails (16, 18) and running rails (20, 22) having a basic shape (38, 40) aligned with a main or branch track (26, 28), the cross frog zone being traversable by a railroad vehicle having a wheel- or bogie-axle with wheels, wherein at least one of the running rails (20, 22), in a region of the cross frog tip (14, 24), has a shape change (34, 36) deviating from its basic shape (38, 40) in such a way that a wheel traversing the running rail is held to a running circle of radius r1 which is smaller than a running circle of radius r2 to which a wheel rolling on the cross frog tip is held.