Actuator assemblies for vehicle brakes

Details Actuator assemblies for vehicle brakes Actuator assemblies for vehicle brakes

1973-09-10

1976-05-04

Blix, Trygve M.

Fluid-pressure and analogous brake systems

Inertia control

188170, 303 10, 303 13, 303 21AF, B60T 806

Patent

active

039543056

ABSTRACT:
An actuator assembly for a vehicle brake includes three axially aligned pistons, a first actuating piston for applying the brake hydraulically during normal service braking; a modulator piston movable for anti-skid purposes between a first position in which an inlet valve controlling the supply of fluid to the first actuating piston is open, and a second position in which the inlet valve is closed; and a second actuating piston resiliently urged through the modulator piston to engage the first actuating piston to apply the brake for parking purposes but normally held out of engagement by fluid pressure in a chamber formed between the modulator piston and the second actuating piston, the pressure in the chamber also holding the modulator piston in the first position.

REFERENCES:
patent: 3547234 (1970-12-01), Cummins et al.
patent: 3613839 (1971-10-01), MacDuff
patent: 3659905 (1972-05-01), Goulish
patent: 3722960 (1973-03-01), Menar
patent: 3724915 (1973-04-01), MacDuff
patent: 3767271 (1973-10-01), Grosseau
patent: 3788710 (1974-01-01), Grunberg et al.

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