Patent ID: 6302011
Filing Date: 2001-10-16
Classification: B60T

Abstract:
A brake booster having a control valve located in a axial bore of a movable wall for communicating a first chamber with a second chamber in a first mode of operation and communicating said second chamber with a surrounding environment to create a pressure differential across said movable wall which separates said first chamber from said second chamber in a second mode of operation, a reaction member carried by said movable wall communicates an operational force created by said pressure differential into an output push rod, said output push rod after overcoming a return spring moving to provide pistons in a master cylinder with a corresponding operational force to develop pressurized fluid which is supplied to wheel brakes to effect a brake application, said brake booster being characterized by a retainer having a base with an axial opening and a plurality of axial legs which extend from the base, said base being located in said axial bore with a shaft of said output push rod passing through said axial opening while said plurality of axial legs frictionally engaging said hub to position said base in said axial bore such that a head of said output push rod is located adjacent said reaction member.