| 摘要 |
Pneumatic brake booster ( 10 ) for a motor vehicle, comprising a moving internal partition ( 14 ) provided with a cup ( 38 ) covered by a sealing diaphragm ( 42 ) connected to the inner periphery of the casing ( 12 ), of the type in which the booster ( 10 ) is intended to be fastened to a bulkhead ( 34 ) of an associated vehicle by means of tie rods ( 24 ) of axial orientation passing through the casing ( 12 ) of the booster ( 10 ) and through the moving partition ( 14 ), and of the type in which the cup ( 38 ) has an aperture ( 46 ) associated with each tie rod ( 24 ) that accommodates a sealing ring ( 48 ) which is, on the one hand, fastened to the cup ( 38 ) and which is, on the other hand, slideably mounted on the associated tie rod ( 24 ), characterized in that the cup ( 38 ) comprises a tubular element ( 50 ) which contains the aperture and which extends at least axially in part around the sealing ring ( 48 ).
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