Pressure proportioning valves

Details Pressure proportioning valves Pressure proportioning valves

1984-02-23

1985-07-23

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Load control

Responsive to fluid pressure spring

188195, 303 28, 303 60, 303 40, B60T 818, B60T 1134

Patent

active

045305447

ABSTRACT:
In an air pressure proportioning variable load valve for a vehicle compressed air braking system the operating mechanism for a self-lapping valve assembly includes a fluid pressure responsive piston arrangement which is operable above a given fluid pressure (PI) to adjust the position of the self-lapping valve arrangement relative to a variable area pressure responsive assembly whereby the rising output pressure corresponds initially to rising input port pressure up to the given pressure (P1) followed by progressive adjustment before proportioning by virtue of relative areas of the variable area assembly.

REFERENCES:
patent: 3228731 (1966-01-01), Valentine
patent: 3671087 (1972-06-01), Pekrul
patent: 4109969 (1978-08-01), Reinecke

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