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US 10,864,782 B2Granted
Devices for reducing tire noise
AssigneeBridgestone Americas Tire Operations, LLC
InventorsMartin A. Yurjevich, Amy M. Randall
Life of this patent
Estimating the term…
Abstract
A noise damper, noise attenuation device, and tire and noise damper assembly are disclosed. The noise damper, noise attenuation device, and tire and noise damper assembly mitigate sound produced by a moving tire. The noise damper and noise attenuation device fit within a tire cavity and expand in reaction to a stimulus.
Claims13
A noise damper, configured for use within a passenger, light-truck, or truck-and-bus-radial tire, comprising:
- a foam that transitions from a compressed state foam to an expanded state foam upon introduction to an atmospheric environment having a relative humidity of at least 20%, wherein
- the compressed state foam includes a primary axis having a compressed abscissa length (CAL), a secondary axis having a compressed ordinate height (COH), and a tertiary axis having a compressed applicate depth (CAD);
- the expanded state foam includes a primary axis having an expanded abscissa length (EAL), a secondary axis having an expanded ordinate height (EOH), and a tertiary axis having an expanded applicate depth (EAD), wherein
- the EAL is configured to extend across 20-120% of a tire section width,
- the EOH is configured to extend across at least 20-120% of a tire section height, and
- the EAD is configured so that the expanded state foam contacts two points on an tire inner circumference;
- and
- the foam has a sound absorption coefficient between 0.4 and 1.5.
5 more elements
A noise attenuation device comprising:
- at least three distinct foam masses, including a first foam mass, a second foam mass, and a third foam mass, all of which expand in volume upon introduction to an atmospheric environment having a relative humidity of at least 20%, to at least partially fill a tire cavity;
- and
- an annular, extensible cord that connects the distinct foam masses, wherein
- the first, second, and third foam masses have a first density before introduction to the atmospheric environment having a relative humidity of at least 20%, and
- the first, second, and third foam masses have a second density that is 70-96% of the first density after introduction to the atmospheric environment having a relative humidity of at least 20%.
2 more elements
Dependencies are inferred from the claim text.