Safety pneumatic tire

Claim 2

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.

Claim 3

The tire defined by claim 1 wherein the shells of the hollow spheres consist of polyvinylidene chloride.

Claim 4

The tire defined by claim 1 wherein the hollow spheres are covered with a lubricant.

Claim 5

The tire defined by claim 1 wherein said suspension further contains freely movable solid particles of cellular material of very low apparent density.

Claim 6

The tire defined by claim 4 wherein said solid particles of cellular material bear a lubricant having a low vapor pressure.

Claim 7

The tire defined by claim 1 wherein said hollow spheres have a diameter of between 0.02 to 0.1 millimeters and a density of between 0.015 and 0.08 g./cc.

Claim 8

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.

Claim 9

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.

Claim 10

The tire defined by claim 7 wherein the shells of the hollow spheres consist of polyvinylidene chloride.

Claim 11

The tire defined by claim 7 wherein said suspension has a low density of from 0.05 to 0.60 g./cc.

Claim 12

The tire defined by claim 9 wherein said suspension has a low density of from 0.08 to 0.26 g./cc.

Claim 13

The tire defined by claim 7 wherein said suspension is in the form of a strip having its nonadhered face covered with a protective sheet.

Claim 14

The tire defined by claim 7 wherein the liquid to pasty synthetic material of low molecular weight has a molecular weight of less than 7,500.

Claim 15

The tire defined by claim 7 wherein the liquid to pasty synthetic material of low molecular weight is a copolyamide.

Claim 16

The tire defined by claim 7 wherein the liquid to pasty synthetic material of low molecular weight is a polybutylene.

Claim 17

The tire defined by claim 7 wherein said suspension further contains freely movable solid particles of cellular material of very low apparent density.

Claim 18

The tire defined by claim 7 wherein said hollow spheres have a diameter of between 0.02 and 0.1 millimeters and a density of between 0.015 and 0.08 g./cc.

Claim 19

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.

Claim 20

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.

Claim 21

The tire defined by claim 17 wherein the shells of the hollow spheres in said first and second suspensions consist of polyvinylidene chloride.

Claim 22

The tire defined by claim 17 wherein the hollow spheres in said first suspension are covered with a lubricant.

Claim 23

The tire defined by claim 17 wherein said second suspension has a low density of from 0.05 to 0.60 g./cc.

Claim 24

The tire defined by claim 20 wherein said second suspension has a low density of from 0.08 to 0.26 g./cc.

Claim 25

The tire defined by claim 17 wherein said second suspension is in the form of a strip having its nonadhered face covered with a protective sheet.

Claim 26

The tire defined by claim 17 wherein the liquid to pasty synthetic material of low molecular weight has a molecular weight of less than 7,500.

Claim 27

The tire defined by claim 17 wherein the liquid to pasty synthetic material of low molecular weight is a copolyamide.

Claim 28

The tire defined by claim 17 wherein the liquid to pasty synthetic material of low molecular weight is a polybutylene.

Claim 29

The tire defined by claim 17 wherein said first and second suspensions further contain free movable solid particles of cellular material of very low apparent density.

Claim 30

The tire defined by claim 26 wherein said solid particles of cellular material bear a lubricant having a low vapor pressure.

Claim 31

The tire defined by claim 17 wherein said hollow spheres in said first and second suspensions have a diameter of between 0.02 and 0.1 millimeters and a density of between 0.015 and 0.08 g./cc.