Suspension header transport

1. A transportable agricultural combine header comprising:

a frame; and

a wheel assembly attached to the frame, the wheel assembly including:

(a) at least one spindle to which a wheel is configured to be mounted;

(b) a rotatable arm connected to and extending from the spindle;

(c) a frame attachment structure attaching the at least one spindle and the rotatable arm to the frame, wherein the frame attachment structure is moveable with respect to the frame between a retracted position for stowing the wheel in a non-use position and a deployed position for engaging the wheel with the ground, wherein the rotatable arm is connected to the frame attachment structure such that the rotatable arm moves along with the frame attachment structure between the retracted position and the deployed position; and

(d) a suspension system interconnecting the rotatable arm and the frame attachment structure for reducing stress on the frame as the agricultural combine header is transported, and wherein the rotatable arm is rotatably connected to the frame attachment structure by the suspension system, wherein the suspension system comprises a shock absorber, spring, coil spring, leaf spring and/or damper that is/are connected between the frame attachment structure and the rotatable arm.

2. The transportable agricultural combine header of claim 1 , wherein the suspension system is a torsion axle, and the torsion axle includes an elongate inner element, a tubular outer element having a larger sectional shape than the inner element and disposed around the inner element, and one or more of the dampers in the form of elongate dampening elements disposed in the spaces therebetween, wherein the outer element and the inner element are rotatable with respect to one another.

3. The transportable agricultural combine header of claim 2 , wherein the inner element is either fixedly connected to or forms part of the rotatable arm, and the outer element is either fixedly connected to or forms part of the frame attachment structure.

4. The transportable agricultural combine header of claim 2 , wherein the inner element is either fixedly connected to or forms part of the frame attachment structure, and the outer element is either fixedly connected to or forms part of the rotatable arm.

5. The transportable agricultural combine header of claim 2 , wherein each dampening element of the torsion axle is an elastomer.

6. The transportable agricultural combine header of claim 1 , wherein movement between the deployed and retracted positions is either manual or automated.

7. The transportable agricultural combine header of claim 6 , further comprising an actuator for moving the wheel assembly between the deployed and retracted positions.

8. The transportable agricultural combine header of claim 7 , wherein the actuator is a hydraulic cylinder.

9. The transportable agricultural combine header of claim 1 , further comprising a cutter bar attached to said frame.

10. An agricultural combine harvester comprising the transportable agricultural combine header of claim 1 .

11. A wheel assembly for a transportable combine header, the wheel assembly comprising:

(a) at least one spindle to which a wheel is configured to be mounted;

(b) a rotatable arm connected to and extending from the spindle;

(c) a frame attachment structure for attaching the at least one spindle and the rotatable arm to the frame, wherein the frame attachment structure is moveable with respect to a frame of the transportable combine header between a retracted position for stowing the wheel in a non-use position and a deployed position for engaging the wheel with the ground, wherein the rotatable arm is connected to the frame attachment structure such that the rotatable arm moves along with the frame attachment structure between the retracted position and the deployed position; and

(d) a suspension system interconnecting the rotatable arm and the frame attachment structure for reducing stress on the frame as the combine header is transported, and wherein the rotatable arm is rotatably connected to the frame attachment structure by the suspension system, wherein the suspension system comprises a shock absorber, spring, coil spring, leaf spring and/or damper that is/are connected between the frame attachment structure and the rotatable arm.

12. The wheel assembly of claim 11 , wherein the suspension system is a torsion axle, and the torsion axle includes an elongate inner element, a tubular outer element having a larger sectional shape than the inner element and disposed around the inner element, and one or more of the dampers in the form of elongate dampening elements disposed in the spaces therebetween, wherein the outer element and the inner element are rotatable with respect to one another.

13. The wheel assembly of claim 12 , wherein the inner element is either fixedly connected to or forms part of the rotatable arm, and the outer element is either fixedly connected to or forms part of the frame attachment structure.

14. The wheel assembly of claim 12 , wherein the inner element is either fixedly connected to or forms part of the frame attachment structure, and the outer element is either fixedly connected to or forms part of the rotatable arm.

15. The wheel assembly of claim 12 , wherein each dampening element of the torsion axle is an elastomer.

16. The transportable agricultural combine header of claim 1 , wherein each of the spindle, rotatable arm and the frame attachment structure are oriented perpendicular with respect to each other in both the retracted and deployed positions.