Tire pressure adjustment system

• US 7,219,540 B2
• Filed: 06/03/2005
• Issued: 05/22/2007
• Est. Priority Date: 06/19/2004
• Status: Active Grant

• Current Assignee: Deere & Company
• Original Assignee: Deere & Company
• Inventors: Nordhoff, Hendrik
• Primary Examiner(s): ALLEN, ANDRE J
• Application Number:
  US11/144,725
• Publication Number:
  US 20050279160A1
• Time in Patent Office: 718 Days
• Field of Search: 731/46, 152/416, 152/417, 137/132, 137/225, 137/226
• US Class Current: 73/146
• CPC Class Codes: B60C 17/02 inflated or expanded in emergency only
• CPC Class Codes: B60C 23/00318 on the wheels or the hubs
• CPC Class Codes: B60C 5/22 the chambers being annular

Abstract

The invention concerns a tire pressure adjusting system for setting the pressure in a tire mounted on a vehicle. A pressure source assigned to the vehicle and at least one connecting line are provided, with which the pressure source can be connected to a tire. The tire can be mounted on a rim. Within the space formed between the tire and the rim, a dividing means is provided, with which the space can be divided into two chambers. In order to reduce the time period for a change in the tire pressure, a means of limitation be provided, with which the volume expansion of a chamber can be limited to a maximum volume value that can be set, and that to change the pressure of the tire only the pressure in one of the two chambers needs to be changed.

Claims

1. A tire pressure adjusting system for adjusting the pressure of a tire mounted on a vehicle using a pressure source on the vehicle and at least one connecting line with which the pressure source is connected to a tire, the tire being mounted on a rim and within a space formed between the tire and the rim, a dividing means is provided, by which the space is divided into two chambers, and wherein within the formed between the tire and the rim a means of limitation is also provided, by which the volume expansion of a chamber is limited to a maximum volume value, and that the pressure of the tire, is increased or decreased by adjusting the pressure in either of the two chambers.

2. A tire pressure adjusting system according to claim 1, wherein the dividing means is a hose that is made of an elastic material.

3. A tire pressure adjusting system according to claim 1, wherein the dividing means has an elastic filling material.

4. A tire pressure adjusting system according to claim 3, wherein the filling material is porous.

5. A tire pressure adjusting system according to claim 3, wherein the filling material is in the form of a foam.

6. A tire pressure adjusting system according to claim 1 wherein the dividing means is constructed in the shape of a torus.

7. A tire pressure adjusting system according to claim 1 wherein the dividing means is placed on or attached to the rim.

8. A tire pressure adjusting system according to claim 1 wherein the means of limitation is a net or fabric of a maximum size that is set and that the dividing means is surrounded by the means of limitation in at least some regions.

9. A tire pressure adjusting system according to claim 1 wherein in one of the chambers formed by the dividing means the pressure remains essentially unchanged.

10. A tire pressure adjusting system according to claim 9 wherein the chamber with the essentially unchanged pressure is arranged at the rim.

11. A tire pressure adjusting system according to claim 1 wherein a change in the tire pressure is achieved by filling or emptying the chamber arranged between the dividing means and the tire.

12. A tire pressure adjusting system according to claim 1 wherein in order to change the pressure relationships in the two chambers, air can be directed from one chamber into the other chamber.

13. A tire pressure adjusting system according to claim 1 wherein a valve is assigned to at least one chamber, through which valve the pressure in the at least one chamber can be changed.

14. A tire pressure adjusting system according to claim 1 wherein the pressure source is selectively connected to both chambers.

15. A tire pressure adjusting system according to claim 1 wherein the pressure source can be selectively connected to both chambers simultaneously.