Patent ID: 8057103
Filing Date: 2011-11-15
Classification: B60C,F16C

Abstract:
1. A roller bearing of a vehicle wheel hub with a tire pneumatic pressure control system, in which compressed air is fed into at least one pneumatic tire through the roller bearing arranged on a rotating shaft, the roller bearing comprising an outer race and an inner race arranged on the shaft, between the outer race and the inner race rows of rolling elements are arranged in raceways, an air ducting channel running radially through the outer race and an air ducting channel running radially through the inner race opening into an intermediate chamber arranged between the rows of rolling elements and sealed from the latter, the intermediate chamber comprising two radially separated sub-chambers, of which a radially outer sub-chamber is connected to the outer race and a radially inner sub-chamber is connected to the inner race, wherein the intermediate chamber has a flow duct embodied as a Venturi nozzle, each sub-chamber of the intermediate chamber being provided with at least one cavity and a nozzle, the cavity being connected to an air ducting channel, and the nozzles of the sub-chambers being arranged radially in series so as to leave a seal gap and each nozzle having a diameter which is smaller than the diameter of the cavities.