Automotive brake system

Brakes – Operators – Spring

Reexamination Certificate

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C188S072600, C188S072900

Reexamination Certificate

active

07025181

ABSTRACT:
A automotive braking system for use on a vehicle for emergency stopping and parking comprising a mechanical brake caliper which exerts frictional stopping force on a brake rotor, the caliper being designed so as to provide a means of transferring mechanical force to the caliper pistons by means of a lever which transfers mechanical force to the piston through one or more apertures in the piston cylinders. The lever is operated by an actuator rod, which is engaged by a spring chamber having a heavy duty parking spring with and opposing force created by a variable pressure means, typically air or hydraulic. The system fails to a safe-mode mode wherein a loss of pressure opposing the parking spring results in the engagement of the braking system, bringing a moving vehicle to rest within a reasonable distance and holding a vehicle parked until such time the pressure can be restored.

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patent: 6230851 (2001-05-01), Yoshizawa et al.
patent: 6488132 (2002-12-01), Matsuishi

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