Patent ID: 7648079

Claim:
A grooved rail for rail vehicles provided with flange wheels, said grooved rail comprising a rail head provided with a running rail, a flange groove, a counterrail, a rail web, a rail base and lateral rail chambers extending between the rail head and the rail base, wherein the running rail comprises a vehicle guiding flange extending towards the flange groove, said flange having a flange inclination of <78° with respect to an essentially horizontal axis of the rail head when depth of the flange groove is >20 mm, and total width of the rail base is asymmetrically arranged with respect to the rail head with reference to a vertical central axis of the rail web whereby the total width of the rail base consists of a first part on a first side of the vertical axis including at least a major portion of the running rail and a second portion on a second side of the vertical axis including the counterrail, the first portion being larger at least by a factor 1.2 than the second portion and width of the running rail being from 55 to 65% of total width of the rail head and further wherein the ratio of total height of the grooved rail to the total width of the rail head is from 1:1.2 to 1:1.4.