Wheel and tire assembly

Patent metadata

Field	Value
Publication number	US-9302539-B2
Application number	US-201213455663-A
Country	US
Kind code	B2
Filing date	Apr 25, 2012
Priority date	Apr 25, 2012
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

A wheel assembly including a rigid wheel having a radially outer rim wall presenting a polygonal shape with a plurality of outermost vertices connecting a plurality of planar faces, and a flexible tire mounted on the outer rim wall. The planar faces of the rigid wheel each have a spacer positioned thereon. The tire is supported by the vertices of the rim wall and is separated from the rim faces by a space, portions of the tire located between the vertices being configured to flex inwardly when subject to ground engaging pressure, the spacers configured to limit the amount of inward flex of the portions of the tire between the vertices.

First claim

Having thus described various embodiments of the invention, what is claimed as new and desired to be protected by Letters Patent includes the following:

1. A wheel assembly comprising:
a rigid wheel including an outer rim wall presenting a polygonal shape with a plurality of outermost vertices connecting a plurality of planar faces;
a flexible tire mounted on the outer rim wall such that the tire is supported by the vertices of the rim wall and is separated from the rim faces by a space, portions of the tire located between the vertices being configured to flex inwardly when subject to ground engaging pressure; and
a plurality of spacers, each spacer positioned on one of the planar faces of the rigid wheel and configured to limit the amount of inward flex of the flexible tire.

2. The wheel assembly of claim 1 , the tire include a plurality of traction lugs extending radially outwardly from an outer surface of the tire, the traction lugs spaced circumferentially around the tire and located between the vertices such that the traction lugs move inwardly with the portions of the tire configured to flex inwardly when subject to ground engaging pressure.

3. The wheel assembly of claim 2 , wherein the spacers are annularly aligned with the traction lugs.

4. The wheel assembly of claim 1 , each of the faces of the outer rim wall being parallel with an axis of rotation of the wheel.

5. The wheel assembly of claim 1 , the tire being a single, solid piece of material of unitary construction.

6. The wheel assembly of claim 1 , wherein the spacers are positioned annularly in the middle of the planar faces of the rigid wheel.

7. The wheel assembly of claim 1 , wherein the spacers are removably attached to the wheel.

8. The wheel assembly of claim 7 , wherein the spacers each are removably attached to the wheel via a fastener.

9. The wheel assembly of claim 8 , wherein the fasteners each comprise a nut and bolt.

10. A wheel assembly comprising:
a rigid wheel including an outer rim wall presenting a polygonal shape with a plurality of outermost vertices connecting a plurality of planar faces;
a flexible tire mounted on the outer rim wall such that the tire is supported by the vertices of the rim wall and is separated from the rim faces by a space, portions of the tire located between the vertices being configured to flex inwardly when subject to ground engaging pressure, the flexible tire including a plurality of traction lugs extending radially outwardly from an outer surface of the flexible tire, the traction lugs spaced circumferentially around the flexible tire and located between the vertices such that the traction lugs move inwardly with the portions of the flexible tire configured to flex inwardly when subject to ground engaging pressure; and
a plurality of spacers, each spacer removably attached to one of the planar faces in annular alignment with one of the traction lugs and configured to limit the amount of inward flex of the flexible tire.

11. A wheel assembly comprising:
a rigid wheel including an outer rim wall presenting a polygonal shape with twelve outermost vertices connecting twelve planar faces;
a flexible tire mounted on the outer rim wall such that the tire is supported by the vertices of the rim wall and is separated from the rim faces by a space, portions of the tire located between the vertices being configured to flex inwardly when subject to ground engaging pressure, the flexible tire including a plurality of traction lugs extending radially outwardly from an outer surface of the flexible tire, the traction lugs spaced circumferentially around the flexible tire and located between the vertices such that the traction lugs move inwardly with the portions of the flexible tire configured to flex inwardly when subject to ground engaging pressure, the flexible tire being a single, solid piece of material of unitary construction; and
twelve spacers, each spacer removably attached to one of the planar faces in annular alignment with one of the traction lugs and configured to limit the amount of inward flex of the flexible tire.

Assignees

• Korus Thomas J
• Pfrenger Jochen
• Lindsay Corp

Inventors

• Korus Thomas J
• Pfrenger Jochen

Classifications

• A01G25/092

  movable around a pivot centre · CPC title

• B60B3/04

  with a single disc body not integral with rim {, i.e. disc body and rim being manufactured independently and then permanently attached to each other in a second step, e.g. by welding} · CPC title

• B60B2900/212

  Damage · CPC title

• B60B15/025

  with non-cylindrical shape · CPC title

• B60C11/0311

  Patterns comprising tread lugs arranged parallel or oblique to the axis of rotation · CPC title