Hydraulic cushioning unit

Details Hydraulic cushioning unit Hydraulic cushioning unit

1989-11-13

1991-12-31

Olszewski, Robert P.

Railway draft appliances

Cushioned

Springs

188287, B61G 908

Patent

active

050764519

ABSTRACT:
A hydraulic cushioning unit includes a high pressure cylinder having a piston therein and a piston rod extended through the rod end of the cylinder. The cylinder is contained within an outer housing. A head casting closes the head ends of the cylinder and housing and an end cap closes the rod ends thereof. The end cap includes a ball stop sleeve protruding interiorly of the cylinder for cooperating with a ball valve port through the cylinder adjacent the rod end thereof to accomplish returned valving of fluid into the high pressure cylinder behind the piston. The same ball stop sleeve supports a resilient bumper for limiting the extent of movement of the cylinder in response to draft forces.

REFERENCES:
patent: 1494135 (1924-05-01), Robison et al.
patent: 1733395 (1929-10-01), Blanchard
patent: 3307842 (1967-03-01), Ellis
patent: 3589528 (1971-06-01), Stephenson
patent: 4805517 (1989-02-01), Conley et al.

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