Patent ID: 8468932
Filing Date: 2013-06-25
Classification: B23P,B60T,F15B,Y10T

Abstract:
1. A braking booster comprising: a housing defining a bore having a surface; a power piston having a piston head slidably disposed within and at one end of said bore; an end cap slidably disposed within and at an opposite mating end of said bore, said end cap including a spring contact portion and an outer rim extending along said bore of said housing, said outer rim including one of a recess and a rib disposed between a first generally planar portion and a second generally planar portion, wherein the first and second generally planar portions are configured to contact said surface of said bore; and a return spring disposed between said piston head and said end cap in contact with said spring contact portion, wherein said housing defines the other of said recess and said rib adjacent said mating end of said bore, said rib configured to be received within said recess and further configured for an interference fit between said end cap and said housing outside said recess, said interference fit being configured such that one of said first and second generally planar portions being displaced further away from said surface of said bore than the other of said first and second generally planar portions.