Piston and shaft assembly of railroad end-of-car cushioning...

Details Piston and shaft assembly of railroad end-of-car cushioning... Piston and shaft assembly of railroad end-of-car cushioning...

B - Operations, Transporting

60

G

213/128

B60G 11/12 (2006.01) B61G 9/08 (2006.01)

Patent

CA 2018994

Case 278-1005-00 PISTON AND SHAFT ASSEMBLY OF RAILROAD END-OF-CAR CUSHIONING DEVICES AND METHOD OF REPAIRING SAME Abstract of the Disclosure This invention concerns an end-of-car hydraulic cushioning device for use on rail cars and a method of repairing such devices. The cushioning device has a piston and shaft assembly which is subject to train action forces. The piston and shaft are connected by means of a threaded engagement which prevents relative axial movements between the two parts. Rotational movement of the piston on the shaft is prevented by a hardened steel pin disposed in aligned, radial holes formed in the piston and shaft. The pin and holes are sized to provide clearance between the piston and pin. This permits piston metal deformation to occur during high speed impacts without cata- strophically stressing the steel pin. A filler rod retains the pin in the radial holes.

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