Patent ID: 7240602
Filing Date: 2007-07-10
Classification: B60T

Abstract:
1. A pneumatic brake booster ( 14 ) comprising: an axially movable control member ( a pneumatic enclosure ( means for forming pneumatic valves comprising: characterized in that: said means for forming pneumatic valves comprise an axially floating tubular support ( 44 ) provided with an intake part ( 44 A) and a balancing part ( 44 B) that move axially with respect to one another to adjust the length of said tubular support ( 44 ); the first (VE 1 ) and second (VE 2 ) balancing valve elements are borne respectively by balancing part ( 44 B) of said tubular support ( 44 ) and the pneumatic piston ( 22 ); the first (VA 1 ) and second (VA 2 ) intake valve elements being borne respectively by the control member ( 20 ) and the intake part ( 44 A) of said tubular support ( 44 ); and the balancing part ( 44 B) and intake part ( 44 A) of the tubular support ( 44 ) are connected to one another by means ( 52 ) for adjusting the axial separation thereof as a function of the power of the force applied to the control member ( 20 ).