Tandem pneumatic brake booster for a vehicle

摘要

The actuator has a pneumatic piston sliding in an outer shell, and movable and sealed plate skirts separating front chambers from rear chambers where skirts drive a pneumatic piston with a push rod. The piston slides inside a sealing device (22) that is fixed to a fixed partition, in a sealed manner, where the device is made of rubber. The device has a lip (23) that is applied on the piston, in a sealed manner and extended parallely to a piston's displacement axis, where the lip is notched with slots (31). The slots are situated opposite to a space (29) between reliefs (27) i.e. protrusions.