Non-pneumatic tire and system for molding non-pneumatic tire

Patent metadata

Field	Value
Publication number	US-9440404-B2
Application number	US-201313952095-A
Country	US
Kind code	B2
Filing date	Jul 26, 2013
Priority date	Jul 26, 2013
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

A system for molding a non-pneumatic tire may include a lower mold portion including a lower face plate configured to provide a lower relief corresponding to a first side of the tire. The system may further include an upper mold portion configured to be coupled to the lower mold portion. The upper mold portion may include an upper face plate configured to provide an upper relief corresponding to a second side of the tire. The system may also include a plurality of mold inserts configured to be positioned between the lower and upper face plates. The mold inserts may include a shell portion at least partially enclosing a void configured to provide a cavity in the tire, and the shell portion of the mold inserts is configured to remain embedded in the tire upon removal of the tire from the lower and upper mold portions.

First claim

What is claimed is:

1. A molded non-pneumatic tire comprising:
an inner circumferential barrier configured to be coupled to a hub;
an outer circumferential barrier radially spaced from the inner circumferential barrier; and
a support structure having two opposing sides extending between the inner circumferential barrier and the outer circumferential barrier, and coupling the inner circumferential barrier to the outer circumferential barrier, wherein the support structure includes:
a plurality of mold inserts at least partially embedded in the support structure, wherein the mold inserts include a shell portion at least partially enclosing a void providing a cavity in the support structure;
wherein the tire has a rotational axis about which the tire rotates, and wherein the cavities define a longitudinal axis and are positioned between the opposing sides of the support structure such that the longitudinal axis is oblique with respect to the rotational axis.

2. The tire of claim 1 , wherein the cavities are tubular and configured to extend between the opposing sides of the support structure.

3. The tire of claim 1 , wherein the cavities are curved.

4. The tire of claim 1 , wherein a first plurality of the cavities forms an inner circular pattern with respect to a first side of the opposing sides of the support structure, and a second plurality of the cavities forms an outer circular pattern with respect to the first side of the opposing sides, and wherein the first plurality of cavities extend radially outward as the first plurality of cavities extend between the first side of the opposing sides and a second side of the opposing sides.

5. The tire of claim 1 , wherein the support structure is formed from polyurethane.

6. The tire of claim 5 , wherein the mold inserts are formed from polyurethane.

7. The tire of claim 6 , wherein the polyurethane forming the support structure is a first polyurethane having a first composition, and the polyurethane forming the mold inserts is a second polyurethane having a second composition.

Assignees

• Caterpillar Inc

Inventors

• Martin Kevin L

Classifications

• B60C2007/107

  Operations & Transport · mapped topic

• B29K2875/00

  Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as mould material · CPC title

• B60C7/10

  characterised by means for increasing resiliency · CPC title

• B29D30/02 Primary

  Solid tyres {; Moulds therefor} · CPC title

• B29K2075/00

  Use of {PU, i.e.} polyureas or polyurethanes {or derivatives thereof}, as moulding material · CPC title