Valve with radiating structure for a tire pressure monitoring system
First Claim
1. In a tire pressure monitoring system the improvement comprising:
- a valve communicating between a tire interior and the atmosphere, the valve comprising;
a valve stem formed of an electrically conductive material and including a valve seat formed in the interior of the valve stem;
a valve pin positioned concentrically within the valve stem and formed of an electrically conductive material, the valve pin being positioned such that it is electrically isolated from the valve stem, the combination of the valve stem and the valve pin forming a shielded coaxial electrical transmission path;
a resilient seal which seals against the valve seat such that, when the resilient seal is seated against the valve seat, air within the tire does not escape to the atmosphere and when the resilient seal is not seated against the valve seat, air can be added to the interior of the tire or air can be permitted to escape to the atmosphere;
a bias spring which biases the resilient seal such that the seal is seated against the valve seat;
a first electrical connector which provides electrical communication between the valve stem and a ground connection of a tire pressure measurement module positioned within a tire such that the valve stem is maintained at ground potential;
a second electrical connector which provides electrical communication between the valve pin and a tire pressure signal connection of the tire pressure measurement module such that the valve pin transmits a signal including tire pressure information, the signal being shielded from electromagnetic interference by the valve stem;
a conductive radiating structure electrically connected or coupled to the valve pin to receive the tire pressure information signal from the valve pin and transmitting the received signal to a receiver.
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Accused Products
Abstract
A valve for a tire pressure monitoring system in which the valve acts a coaxial conductor to transmit a signal to a receiver presented. A valve stem electrically isolated from a valve pin form the coaxial conductor. In a tire pressure monitoring system, a tire pressure measurement module is positioned inside a tire. In one embodiment, a conductive radiating structure is electrically connected or coupled to the valve pin to receive the tire pressure information signal and transmit it to a receiver. The above configuration further permits a rechargeable battery in the tire pressure measurement module to be recharged via the tire valve. The valve pin and valve stem, being electrically isolated from one another, are used as recharging paths for the battery.
30 Citations
14 Claims
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1. In a tire pressure monitoring system the improvement comprising:
a valve communicating between a tire interior and the atmosphere, the valve comprising; a valve stem formed of an electrically conductive material and including a valve seat formed in the interior of the valve stem; a valve pin positioned concentrically within the valve stem and formed of an electrically conductive material, the valve pin being positioned such that it is electrically isolated from the valve stem, the combination of the valve stem and the valve pin forming a shielded coaxial electrical transmission path; a resilient seal which seals against the valve seat such that, when the resilient seal is seated against the valve seat, air within the tire does not escape to the atmosphere and when the resilient seal is not seated against the valve seat, air can be added to the interior of the tire or air can be permitted to escape to the atmosphere; a bias spring which biases the resilient seal such that the seal is seated against the valve seat; a first electrical connector which provides electrical communication between the valve stem and a ground connection of a tire pressure measurement module positioned within a tire such that the valve stem is maintained at ground potential; a second electrical connector which provides electrical communication between the valve pin and a tire pressure signal connection of the tire pressure measurement module such that the valve pin transmits a signal including tire pressure information, the signal being shielded from electromagnetic interference by the valve stem; a conductive radiating structure electrically connected or coupled to the valve pin to receive the tire pressure information signal from the valve pin and transmitting the received signal to a receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A valve for a tire pressure monitoring system comprising:
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a valve stem formed of an electrically conductive material and including a valve seat formed in the interior of the valve stem; a valve pin positioned concentrically within the valve stem and formed of an electrically conductive material, the valve pin being positioned such that it is electrically isolated from the valve stem, the combination of the valve stem and the valve pin forming a shielded coaxial electrical transmission path such that when the valve pin transmits a signal including tire pressure information, the signal is shielded from electromagnetic interference by the valve stem; a resilient seal which seals against the valve seat such that, when the resilient seal is seated against the valve seat, air within the tire does not escape to the atmosphere and when the resilient seal is not seated against the valve seat, air can be added to the interior of the tire or air can be permitted to escape to the atmosphere; a conductive radiating structure electrically connected or coupled to the valve pin to receive the tire pressure information signal from the valve pin and transmit the received signal to a receiver. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification