Brake servo unit for motor vehicles has sealing element with integral two-part membrane to cover pneumatic connection insertion aperture before assembly

摘要

The servo unit has a housing part (3) with an opening (7) and a flexible seal element (9) fitted into it. The element has an integral membrane, to cover an aperture (10) for a pneumatic connection (8) mainly at right angles to insertion direction, but does resist insertion of a pneumatic connection. The membrane is fastened gas-proof to the seal element. It consists of at least two elastically mounted separate flap-like sealing elements (13,15), which are aligned to seal the aperture before the connection is inserted, and are pivoted into the housing interior during insertion.