Robert Boschgmbh

Lionel Bourgois

Philippe Bourlon

Antony Auguste

Daniel Grech

Stéphane Lacroix

Marc Noblet

Yannick Nen

Omar Brahmi

Nicolas Quiniou

Jérémy Labarre

Dominique Rault

The invention relates to a method for fitting/removing a brake master cylinder (MC) of a motor vehicle providing the installation of a temporary retaining pin (g) in an access hole (tr) located on the periphery of the master cylinder (MC) so that the pin (g) emerges inside the barrel (al) between the mouth (MCe) of the barrel and either the primary or the secondary piston (pp or ps).

Process of assembly of master cylinder

Our problem relates to a master cylinder with a U-shaped seal. Our goal is to avoid defective bleeding of hydraulic braking systems. The defects arise out of the fact that the vacuum causes the lips of the seal () to stick together and to stick against the wall (). To achieve this, reliefs () will be created on one wall () of one lip () facing the other lip () and on the edge face () of this same lip. These reliefs will prevent the lips from sticking tightly to one another and to the wall facing the edge face of the lips. This lack of sticking will prevent a vacuum from being created between the two lips and between the edge face of the lips and the wall (). As a result, the seal will be able to return to a position in which bleeding can be performed effectively.

Master cylinder with U-shaped seal

Growing community of inventors

Montmagny, France

Lionel Bourgois