Anti-lock braking system with nonback driveable actuator

Details Anti-lock braking system with nonback driveable actuator Anti-lock braking system with nonback driveable actuator

1991-05-01

1993-06-15

Graham, Matthew G.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

192 8C, B60T 842, F16D 5104

Patent

active

052192130

ABSTRACT:
A vehicle braking system is provided. In a preferred embodiment, the system has an actuator frame with a bore fluidly connected to the wheel brake and to a master cylinder. A piston, mounted within the bore, is operationally associated with a non-rotative nut which is threadably engaged by a power screw. To maximize reaction speed, a high efficiency thread is utilized between the power screw and the non-rotative nut. Therefore, pressure within the actuator can backdrive the piston. To prevent backdriving of the piston, there is a spring locking mechanism. The spring locking mechanism has a driver, a driven member and a coil spring with an inward-directed tang at its end. The tang is nested within a generally radial bore of a tab of the driven member.

REFERENCES:
patent: 1965878 (1934-07-01), Briggs
patent: 2145666 (1939-01-01), Roethel
patent: 4651854 (1987-03-01), Harada
patent: 4653815 (1987-03-01), Agarwal et al.
patent: 5011237 (1991-04-01), Matouka et al.

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