BRAKE SYSTEM FOR VEHICLE DESIGNED TO PRODUCE BRAKING FORCE IN CASE OF LOSS OF ELECTRIC POWER
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United States of America Patent
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Issued Date -
Jan 1, 2015
app pub date -
Jun 25, 2014
filing date -
Jun 28, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A braking device for a vehicle is provided which includes a power fail-safe mechanism which works to create frictional braking force at a wheel of the vehicle in the event of loss of electric power. The braking device is equipped with an electromagnetic valve which is of a normally closed type. In the event of loss of electric power in the braking system, the electromagnetic valve is closed to block fluid communication between a hydraulic booster and a brake fluid reservoir, so that a stroke chamber in the hydraulic booster is hermetically closed. This enables the pressure in a master cylinder to rise in response to depression of a brake pedal to develop the frictional braking force.
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