Importance

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Abstract

A tire pressure control unit for motor vehicles with a rotary transmission leadthrough 2 for transmitting a pressure means from a part, stationary with respect to a rotatably supported wheel 3, of the motor vehicle to the rotatably supported wheel 3, wherein the rotary transmission leadthrough 2 comprises at least one chamber 14, 15 delimited by an annular body 4, 5 disposed at the stator side and by [an annular body (4, 5)] disposed at the rotor side concentrically with respect to the rotational axis of wheel 3, and wherein for sealing the at least one chamber 14, 15 sealing rings are inserted between the stator-side annular body 4 and the rotor-side annular body 5, is defined thereby that the stator-side annular body 4 and the rotor-side annular body 5 are disposed one next to the other in the axial direction with respect to the rotational axis of the wheel 3 leaving a motion gap 11, into the face facing toward the rotor-side annular body 5, of the stator-side annular body 4 for the radial sealing of the at least one chamber 14, 15 two concentric annular grooves 20, 21 or 21, 22, respectively, are introduced, the annular grooves 20, 21 or 21, 22, respectively, with their termination facing away from the rotor-side annular body 5 are connected to a control line 25, 27 which can be activated by a pressure means, into the annular grooves 20, 21 or 21, 22, respectively, in each instance one of the sealing rings is placed, which, upon the control line 25, 27 being pressurized is moved in the direction toward the rotor-side annular body 5, and from the rotor-side annular body 5 an output line 28, 29 terminates in the at least one chamber 14, 15.

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First Claim