Patent ID: 7698988

Claim:
Brake booster intended to transmit hand brake cable commands, comprising a control rod ( 1 ), a plunger ( 3 ) able to move axially under the command of the control rod ( 1 ), an enclosure ( 2 ) containing a moving wall ( 22 ) dividing the inside of the enclosure into a working chamber ( 21 ) and a vacuum chamber ( 20 ) which is connected to a vacuum generator, said wall being able to move axially under the effect of said plunger ( 3 ) which creates a difference in pressure between the vacuum chamber and the working chamber, a piston ( 5 ) able also to move axially and secured to the moving wall ( 22 ) of the enclosure, a three-way valve ( 4 ) controlled by said plunger ( 3 ) allowing the working chamber ( 21 ) to be connected either to the vacuum chamber or to atmospheric air, a reaction disk, and an output rod ( 6 ) passing through the center of the reaction disk ( 7 ), the control rod ( 1 ) passing through the center of the reaction disk ( 7 ), wherein the control rod ( 1 ) is situated on the same side as the vacuum chamber ( 20 ) and, under a braking command, exerts a pulling force on the plunger ( 3 ).