Patent ID: 6295919
Filing Date: 2001-10-02
Classification: B60T

Abstract:
A braking device for a vehicle comprising:a pneumatic booster, said booster having rigid casing consisting of a front shell and a rear shell, said front shell and rear shell forming respective a front wall for a front chamber and a rear wall for a rear chamber which are defined inside of the casing and separated from each other be a moving partition;a through-bolt passing through the front shell and rear shell in an axial direction to join said front shell to said rear shell, said through bolt having a threaded front end that extend outside of said front chamber and a shoulder on which said front wall rest inside of said front chamber;a master cylinder having a flange pierced with a hole through which said front end of said through-bolt passes; anda securing nut connecting to said front end of said through-bolt, said securing nut being characterised by a barrel engaging in said hole said flange and being screwed onto said front end of said through-bolt and a collar pressing said flange against said front shell, and in that said barrel of said securing nut and said shoulder of said through-bolt have first and second respective sections facing each other and in that said first section is larger that said second section and completely covers said second section such that an impact force applied to said master cylinder causes said first section to shear said first front wall and be absorb rather than being transmitted into said through-bolts.