Safety pneumatic tire
AssigneeMichelin Recherche et Technique S.A.
InventorsBodo Hagenbohmer, Philipp Schaefer
Life of this patent
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Abstract
Tires are improved against puncture damage by at least partially filling the inside of the tire with hollow spheres which contain a gas and whose thin shell consists of synthetic material, these spheres having a diameter of between 0.01 and 0.04 mm. and a density of 0.005 to 0.25 g/cc., and/or by lining at least a portion of the surface of the inner wall of the tire with a strip of composite material of low density comprising a suspension of said hollow spheres in a mass of liquid or pasty synthetic material of low molecular weight.
Claims28
In a tire having an inner wall defining a tire cavity and containing a filling material for plugging punctures, the improvement which comprises said filling material being a suspension of hollow spheres, said suspension comprising a gaseous continuous phase containing freely movable suspended hollow spheres having thin shells consisting of synthetic material, said hollow spheres containing a gas in the centers thereof and having a diameter of from 0.01 to 0.4 millimeters and a density of from 0.005 to 0.25 g./cc., said suspension at least partially filling the tire cavity.
In a tire having an inner wall defining a tire cavity and containing a filling material for plugging punctures, the improvement which comprises said filling material being a suspension of hollow spheres, said suspension comprising a liquid to pasty continuous phase of synthetic material of low molecular weight containing freely movable suspended hollow spheres having thin shells consisting of synthetic material, said hollow spheres containing a gas in the centers thereof and having a diameter of from 0.01 to 0.4 millimeters and a density of from 0.005 to 0.25 g./cc., said suspension being adhered on at least the portion of the inner wall of the tire below the tread.
In a tire having an inner wall defining a tire cavity and containing a filling material for plugging punctures, the improvement which comprises said filling material being a combination of a first and a second suspension of hollow spheres, said first suspension comprising a gaseous continuous phase containing freely movable suspended hollow spheres having thin shells consisting of synthetic material, said hollow spheres containing a gas in the centers thereof and having a diameter of from 0.01 to 0.4 millimeters and a density of from 0.005 to 0.25 g./cc., said first suspension at least partially filling the tire cavity;
- and said second suspension comprising a liquid to pasty continuous phase of synthetic material of low molecular weight containing freely movable suspended hollow spheres having thin shells consisting of synthetic material, said hollow spheres containing a gas in the centers thereof and having a diameter of from 0.01 to 0.4 millimeters and a density of from 0.005 to 0.25 g./cc., said second suspension being adhered on at least the portion of the inner wall of the tire below the tread.
Dependencies are inferred from the claim text.