Blend back proportioning valve

Details Blend back proportioning valve Blend back proportioning valve

1973-11-29

1976-03-23

Blix, Trygve M.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

13750525, 188349, 200 82D, 303 84A, B60T 826

Patent

active

039456862

ABSTRACT:
A motor vehicle hydraulic brake system includes a front brake circuit and a rear brake circuit. The rear brake circuit includes a blend back proportioning valve which controls the pressure in the rear brake circuit. The blend back proportioning valve includes a proportioning piston which cooperates with a valve seat to maintain increases in rear brake pressure proportional to but less than increases in master cylinder pressure between a first predetermined pressure and a second predetermined pressure. A blend back spool moves the valve seat away from the proportioning piston to equalize master cylinder pressure and rear brake pressure when the second predetermined pressure is reached.

REFERENCES:
patent: 3598451 (1971-08-01), Doerfler
patent: 3637963 (1972-01-01), Wellmann
patent: 3672728 (1972-06-01), Keady et al.
patent: 3701567 (1972-10-01), Shutt et al.
patent: 3706477 (1972-12-01), Stelzer
patent: 3712683 (1973-01-01), Keady et al.
patent: 3727989 (1973-04-01), Keady
patent: 3734570 (1973-05-01), Stelzer
patent: 3801159 (1974-04-01), Fulmer
patent: 3806200 (1974-04-01), Fulmer

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