Patent ID: 7237590
Filing Date: 2007-07-03
Classification: B60C

Abstract:
1. A device for maintaining a desired inflation pressure of an interior of a tire mounted on a wheel of a vehicle, the wheel being rotatably connected to a stationary member of a vehicle wheel assembly and defining an axis of rotation, the device comprising: at least one magnetic element being mounted on the stationary member at a radial distance from the axis of rotation, the magnetic element producing a magnetic field; a magnetically driven air compressor being mounted on the wheel and being radially disposed from the axis of rotation relative to the magnetic element to transit the magnetic field during each revolution of the wheel, the compressor being in fluid communication with the atmosphere and the interior of the tire, the compressor being operative to intake air from the atmosphere and to output compressed air to the interior of the tire in response to transiting the magnetic field; and means for regulating output pressure of the compressor to the desired inflation pressure without off-wheel aid.