Pressure modulating valves

Details Pressure modulating valves Pressure modulating valves

1980-01-31

1981-07-28

Reger, Duane A.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

B60T 826

Patent

active

042807395

ABSTRACT:
The invention relates to vehicle braking system pressure modulating valves of the kind in which, above a first threshold of master cylinder pressure, the brake pressure increases with increasing master cylinder pressure but at a reduced rate, this rate being increased when a second threshold of master cylinder pressure is reached.
In the valve according to the invention a primary plunger and a secondary plunger are carried in separate bores in the valve housing, there being a lost motion connection between them. Primary spring determines the first threshold pressure and secondary spring determines the second threshold pressure.

REFERENCES:
patent: 3680922 (1972-08-01), Kawai
patent: 3738708 (1973-06-01), Kawaguchi et al.

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