Braking system with nonbackdriveable actuator

Details Braking system with nonbackdriveable actuator Braking system with nonbackdriveable actuator

1992-07-13

1993-09-21

Graham, Matthew C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

B60T 858

Patent

active

052462820

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 a tang at its end. The driven member has an elastomeric torsion member to absorb torsion shocks.

REFERENCES:
patent: 3831724 (1974-08-01), Baer
patent: 4418811 (1983-12-01), MacDonald
patent: 4653815 (1987-03-01), Agarwal et al.
patent: 4838622 (1989-06-01), Kircher et al.
patent: 5011237 (1991-04-01), Matouka et al.

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