US 12,472,998 B2
Energy dissipation device
Roger Danielsson, Krylbo (SE)
Assigned to RXD—RESEARCH EXCHANGE DEVELOPMENT AB, Krylbo (SE)
Appl. No. 18/028,411
Filed by RXD—RESEARCH EXCHANGE DEVELOPMENT AB, Krylbo (SE)
PCT Filed Aug. 25, 2021, PCT No. PCT/SE2021/050824
§ 371(c)(1), (2) Date Mar. 24, 2023,
PCT Pub. No. WO2022/071839, PCT Pub. Date Apr. 7, 2022.
Claims priority of application No. 2030300-4 (SE), filed on Sep. 30, 2020.
Prior Publication US 2023/0365168 A1, Nov. 16, 2023
Int. Cl. B61G 11/16 (2006.01); B61G 7/10 (2006.01); B61G 9/04 (2006.01); B61G 11/18 (2006.01)
CPC B61G 11/16 (2013.01) [B61G 7/10 (2013.01); B61G 9/04 (2013.01); B61G 11/18 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An energy dissipation device for a train coupler adapted for absorbing kinetic energy from a collision, the energy dissipation device comprising:
a cylindrical housing, in one end having coupling means for coupling the housing in fixed relation to a train coupler;
at least one axially compressible, irreversibly deforming element of steel in the housing, the at least one axially compressible, irreversibly deforming element(s) extended in coaxial relation with the housing from said one end towards a second end of the housing; and
a compression means retractable into the housing via said one end or said second end of the housing;
wherein the at least one axially compressible, irreversibly deforming element is pre-tensioned axially between said retractable compression means and a counter pressure means stationary secured in the housing in an axially opposite relation to the retractable compression means in said one end or said second end of the housing, and
wherein the retractable compression means has a circular periphery shaped for guidance in non-destructive sliding contact with an inside wall of the housing upon retraction and compression of the compressible, irreversibly deforming element, while preserving an integrity of the housing.