Patent ID: 9707949
Date: 2017-07-18
CPC Classifications: B60T

Claim:
1. An electrohydraulic servo brake comprising: a first auxiliary piston; an electric motor configured to drive the first auxiliary piston; a reaction disc; a push rod including an end portion connected to the first auxiliary piston by a connection apparatus including (i) a support fixedly connected to the push rod and operatively connected to a tared pressure spring, (ii) a central piston in abutment with the reaction disc and fixedly connected to the push rod, and (iii) a second auxiliary piston configured to surround the central piston by being placed against the reaction disc in a state pushed by the tared pressure spring and retained in an end position by the central piston, and the second auxiliary piston configured to move backward with respect to the central piston; a main brake cylinder controlled by the push rod and configured to be actuated by the auxiliary piston via the reaction disc; a control rod connected to a brake pedal; a plunger piston configured to extend through the first auxiliary piston and to press on a portion of the reaction disc by being connected to the control rod; and a detector configured to detect movement of the control rod in order to actuate the electric motor.