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

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

1989-07-03

1990-09-04

Peters, Jr., Joseph F.

Railway draft appliances

Cushioned

Continuous

213 43, B61G 912

Patent

active

049537270

ABSTRACT:
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 catastrophically stressing the steel pin. A filler rod retains the pin in the radial holes.

REFERENCES:
patent: 3791534 (1974-02-01), Stephenson

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