Hydraulic modulator for brake device

Details Hydraulic modulator for brake device Hydraulic modulator for brake device

2011-01-25

2011-01-25

Williams, Thomas J (Department: 3657)

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

C188S162000, C188S072600, C188S072800

Reexamination Certificate

active

07874626

ABSTRACT:
A hydraulic modulator includes a cylinder for slidably supporting a power piston and changing the volume of a hydraulic chamber communicating with brake calipers according to the sliding of the power piston, and an electric motor for sliding the power piston through a power transmitting mechanism. The cylinder extends parallel to a rotating shaft, and a rotational motion of the electric motor is converted into a linear motion on an axis parallel to the rotating shaft. The power transmitting mechanism is provided by a ball screw mechanism composed of a ball screw nut, balls, and a ball screw shaft for converting the rotational motion of the electric motor into the linear motion of the push slider. The push slider has a head portion coming into spherical contact with the power piston. The hydraulic modulator so configured has a small size, and an improved arrangement of components.

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