Granted Patent B2

US 7,677,274 · App. 12/355,472 · Granted Mar 16, 2010

Assignee: Kreska Technologies

Abstract

Claims (31)

1. A method of ensuring pressure equalization between a plurality of tires during conversion of fill gas in the plurality of tires from a first gas mixture to a final gas mixture, wherein the final gas mixture has a higher concentration of nitrogen than the first gas mixture, and wherein the plurality of tires are in fluid communication via a manifold, the method comprising:

extracting a portion of the first gas mixture from the plurality of tires through the manifold;

supplying nitrogen gas to the plurality of tires from a nitrogen source through the manifold creating a second gas mixture, the second gas mixture comprising the first gas mixture and the supplied nitrogen gas;

extracting a portion of the second gas mixture from the plurality of tires through the manifold; and

supplying nitrogen gas to the plurality of tires from the nitrogen source through the manifold creating a third gas mixture, the third gas mixture comprising the first gas mixture, the second gas mixture and the supplied nitrogen gas.

2. The method of claim 1 , wherein the final gas mixture is the third gas mixture.

3. The method of claim 1 , comprising:

extracting a portion of the third gas mixture from the plurality of tires through the manifold;

supplying nitrogen gas to the plurality of tires from the nitrogen source through the manifold creating the final gas mixture, the final gas mixture a function of the first gas mixture, the second gas mixture, the third gas mixture and the supplied nitrogen gas.

4. The method of claim 1 , wherein the step of extracting a first gas mixture includes reducing the volume of fill gas in the plurality of tires and the step of supplying nitrogen gas to the plurality of tires includes increasing the volume of fill gas in the plurality of tires.

5. A method of ensuring pressure equalization between a plurality of tires during conversion of a fill gas from a first gas mixture to a second gas mixture with a greater nitrogen concentration than the first gas mixture, wherein the conversion includes evacuation of the fill gas and inflation of the tires at least twice, the method comprising:

providing a plurality of supply hoses in fluid communication with each other;

attaching each of the supply hoses to a corresponding valve stem on the plurality of tires;

supplying pressurized nitrogen from a gas source to said plurality of tires via the supply hoses;

monitoring and controlling a gas characteristic of the pressurized nitrogen in the plurality of supply hoses to thereby inflate the plurality of tires to a first predetermined pressure to thereby ensure pressure equalization between each of the plurality of tires;

releasing the fill gas through the plurality of supply hoses; and,

monitoring and controlling a gas characteristic of the fill gas in the plurality of supply hoses to thereby deflate the plurality of tires to a second predetermined pressure to thereby ensure pressure equalization between each of the plurality of tires and evacuation of the fill gas.

6. The method of claim 5 , further comprising:

inputting into a processor the number and identity of the plurality of tires;

retrieving tire data associated with the identity of the plurality of tires; and

determining the first predetermined pressure based on tire data and at least one monitored gas characteristic.

7. The method of claim 5 , wherein the gas characteristic is selected from the group consisting of: pressure, temperature, concentration and flow rate.

8. A method of ensuring pressure equalization between a plurality of tires during conversion of fill gas in the plurality of tires from an initial gas mixture to a desired gas mixture, the initial gas mixture having an initial pressure and wherein the desired gas mixture has a higher concentration of nitrogen than the initial gas mixture, comprising:

establishing fluid communication between the plurality of tires via a manifold;

decreasing pressure in the plurality of tires from the initial pressure by extracting a portion of the initial gas mixture from the plurality of tires through the manifold until a predetermined decreased pressure is reached in the manifold;

increasing pressure of the plurality of tires from the predetermined decreased pressure by supplying nitrogen gas to the plurality of tires from a nitrogen source through the manifold until a predetermined increased pressure is reached in the manifold to create an intermediate gas mixture, the intermediate gas mixture having a higher concentration of nitrogen than the initial gas mixture;

decreasing pressure in the plurality of tires from the increased pressure by extracting a portion of the intermediate gas mixture from the plurality of tires through the manifold until a second predetermined decreased pressure is reached in the manifold;

increasing pressure of the plurality of tires from the second predetermined decreased pressure by supplying nitrogen gas to the plurality of tires from a nitrogen source through the manifold until a desired pressure is reached in the manifold to create a desired gas mixture; and

de-establishing fluid communication between each one of the plurality of tires.

9. The method of claim 8 , wherein the decreased pressure and the second decreased pressure are substantially less than the initial pressure and the increased pressure.

10. The method of claim 8 , wherein the initial gas mixture consists of air.

Assignments (11)

Continuity (3)