Patent ID: 9555672
Date: 2017-01-31
CPC Classifications: B60C,Y10T

Claim:
1. A pressure control device for a rotary feedthrough of a vehicle tire inflating system having at least one tire that is inflatable with compressed air by way of the rotary feedthrough, the pressure control device comprising: a ventilating inlet configured to receive compressed air with a ventilating inlet pressure; a ventilating outlet configured to inflate the at least one tire with a ventilating outlet pressure by way of the rotary feedthrough; a seal actuating outlet configured to activate at least one seal by compressed air with a seal actuating pressure for sealing an air chamber arranged between a stator and a rotor of the rotary feedthrough; a switchover valve that is pneumatically switchable by a switching pressure to ventilate the ventilating outlet with the ventilating outlet pressure only when the switching pressure is at least as high as a predefined minimum switching pressure; and a compressed air guide configured to build up both the switching pressure and the seal actuating pressure such that the build up of the switching pressure to the predefined minimum switching pressure is delayed with respect to the build-up of the seal actuating pressure to the predefined minimum switching pressure in order to ventilate the ventilating outlet in response to build-up of the ventilating inlet pressure at the ventilating inlet at least to the predefined minimum switching pressure.