Patent ID: 8955423
Filing Date: 2015-02-17
Classification: B60T

Abstract:
1. A tandem-type pneumatic brake booster for hydraulic vehicle brake systems comprising: a housing including a first housing half shell and a second housing half shell, the interior of which is divided at least in part by a partition into a front and a rear booster chamber, wherein the partition has a centrally arranged, circular cavity, through which a control housing or a cylindrical control housing extension extends, and wherein the partition rests sealingly against the control housing or the control housing extension by a sealing element, a first and a second movable wall, which respectively subdivide the front and the rear booster chamber into a first low-pressure chamber and a first working chamber and into a second low-pressure chamber and a second working chamber, at least one connecting conduit between the first working chamber and the second working chamber to equalize pressure between said two working chambers, wherein the connecting conduit is a cylindrical sleeve which penetrates the partition and the second movable wall, said sleeve being configured to allow forces to be deflected from the partition to a vehicle-mounted wall, and a tie rod having at least two ribs for centering the sleeve.