Velocity-controlled railway buffer

Details Velocity-controlled railway buffer Velocity-controlled railway buffer

1990-12-28

1992-11-03

Oberleitner, Robert J.

Spring devices

Vehicle

Mechanical spring and nonresilient retarder

188289, 188284, 213223, B60G 1506

Patent

active

051601230

ABSTRACT:
A buffer for railway vehicles includes a plunger telescopically received within an outer cylinder. An internal speed control valve, essentially independently of the forces acting on the buffer, causes the buffer to move inwardly at a predetermined initial velocity which is reduced by a uniform deceleration of such a level that the main portion of the plunger stroke is always used. The initial velocity corresponds to the maximum speed allowed during shunting operations, plus a safety margin determined by experience. The buffer has a leakage slot between the plunger and the cylinder to allow fluid flow around a throttling valve when the throttling valve is closed. The area of the leakage slot is dependent on the pressure within the buffer and the position of the plunger relative to the cylinder.

REFERENCES:
patent: 3215426 (1965-10-01), Engels
patent: 3367454 (1968-02-01), Schenk et al.
patent: 3456764 (1969-07-01), Myers
patent: 3458054 (1969-07-01), Thompson et al.
patent: 3554387 (1971-01-01), Thornhill

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