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US 2006/0201600 A1Published application
Lubricants for run-flat tire systems
OwnerEdward Kollininventor
Life of this patent
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Abstract
A lubricant for a run-flat tire system includes a solubilized oil, an oil-miscible or oil-soluble carrier fluid or other non aqueous carrier fluid, a thickener, and a surfactant. The thickening system hereof retains its rheological properties and is not subject to permanent thinning shear. When admixed with optionally, a surfactant and, a lubricity agent, the lubricant exhibits long term viscometric stability (shelf life) and prevents the buildup of heat due to friction in the tire assembly when the tire is in the run-flat condition.
Claims11
A run-flat tire, comprising:
- (a) an outer tire;
- (b) an inner support ring, disposed interiorly of the carcass and having a surface facing the interior surface of the tire;
- and
- (c) a lubricant disposed between the facing surface and the interior of the tire, the lubricant comprising:
- (1) a carrier fluid selected from the group consisting of a solubilized oil, an oil-soluble fluid, an oil-miscible fluid and mixtures thereof;
- (2) a thickener;
- wherein the lubricant has an initial viscosity above 100,000 centipoises at 25° C. and from 1 to 20 RPM as measured with a Brookfield viscometer, the lubricant undergoing temporary shear thinning and returning to substantially its starting viscosity after contact between an inner surface of an outer tire and a support ring of the run-flat tire.
4 more elements
Dependencies are inferred from the claim text.