Fluid pressure control valve device for a railway car

Details Fluid pressure control valve device for a railway car Fluid pressure control valve device for a railway car

1991-09-24

1992-09-15

Nilson, Robert G.

Fluid handling

Systems

Sequentially closing and opening alternately seating flow...

303 225, 303 228, 303 81, F16K 31126

Patent

active

051469529

ABSTRACT:
A control valve device for a railway car having an arrangement for changing the axial position of a variable area piston in order to adjust the output pressure of a piston valve assembly in accordance with a high or low speed of the railway car. The axial position of a supply valve seat is set in accordance with a high or low speed signal to in turn set the axial posiiton at which the piston assembly, including the variable area piston, assumes a lap condition.

REFERENCES:
patent: 3228731 (1966-01-01), Valentine
patent: 4883089 (1989-11-01), Tamamori
patent: 4917148 (1990-04-01), Tamamori

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