CA1144463A - Pneumatic tire - Google Patents
Pneumatic tireInfo
- Publication number
- CA1144463A CA1144463A CA000372470A CA372470A CA1144463A CA 1144463 A CA1144463 A CA 1144463A CA 000372470 A CA000372470 A CA 000372470A CA 372470 A CA372470 A CA 372470A CA 1144463 A CA1144463 A CA 1144463A
- Authority
- CA
- Canada
- Prior art keywords
- carcass
- bead
- tire
- bead core
- structures
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C3/00—Tyres characterised by the transverse section
- B60C3/04—Tyres characterised by the transverse section characterised by the relative dimensions of the section, e.g. low profile
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
A PNEUMATIC TIRE
Abstract of Disclosure A pneumatic tire (10) having a first carcass reinforcing structure (23) and a second carcass reinforcing structure (24). The first reinforcing structure (23) being wrapped adjacent the axially inward surface of the bead core in each bead portion and the second reinforcing structure (24) being wrapped adjacent the axially outer surface of the bead core in each bead portion.
The neutral contour of each first and second carcass reinforcing structure coincides with its respective natural equilibrium curve.
Abstract of Disclosure A pneumatic tire (10) having a first carcass reinforcing structure (23) and a second carcass reinforcing structure (24). The first reinforcing structure (23) being wrapped adjacent the axially inward surface of the bead core in each bead portion and the second reinforcing structure (24) being wrapped adjacent the axially outer surface of the bead core in each bead portion.
The neutral contour of each first and second carcass reinforcing structure coincides with its respective natural equilibrium curve.
Description
1~4~63 The foregoing abstract is not to be taken as limiting the invention of this application, and in order to understand the full nature and extent of the technical disclosure of this application, refe-rence must be made to the accompanying drawings inthe following detailed description.
Back~round of the Invention This invention relates to a pneumatic tire, and more particularly, to a novel and improved pneumatic - 10 tire.
It is well known in the prior art that it is desirable to cure a tire in a configuration such that the carcass ply structure follows the natural equili-; brium curve for at least a portion of its length. The natural equilibrium curve is the shape the carcass plystructure tends to assume as prescribed by its cord path and dimensions when mounted on the rim for which it is designed and inflated to design inflation pres-sure. This concept is thoroughly discussed and ex-plained in "Mathematics Underlying The Design ofPneumatic Tire" by John F. Purdy. U.S. Patent Nos.
3,757,844; 3,910,336; and 3,938,575 are illustrative of the prior art wherein at least a portion of the carcass ply structure follows the natural equilibrium curve.
During normal operation of a pneumatic tire, the ~ bead area is subject to torsional forces and stress - concentrations which can substantially detract from ~; the durability, handling and overall performance of the tire. The prior art does not take into account these forces. In the prior art the carcass ply layers are all immediately adjacent one another or are dis-posed at positions symmetrically about the natural equilibrium curve in the bead area. The carcass ply structure does not contribute to the lateral stability ~, .~ ~
of the tire or improve bead durability under la~eral forces.
Applicant has designed an improved pneumatic tire which has the advantages of a tire having the carcass plies located at the natural equilibrium curve while at the same time providing improved handling and durability.
Summary of the Invention In accordance with the present invention, there is provided a pneumatic tire comprising a ground engaging tread portion, said tread portion terminating in a pair of shoulder portions, one at each lateral end thereof, a pair of sidewall portions extending radially inward from said shoulder portions terminating in a pair of bead portions respectively, each of said bead portions having at least one inextensible bead core, a first carcass reinforcing ply structure extending from bead core to bead core, the terminal ends of said first carcass ply structure each being wrapped adjacent the axially inner surface of each respective bead core and, a second carcass reinforcing ply structure extending from bead core to bead core the terminal ends of said carcass reinforced ply structure being wrapped adjacent the axially outermost surface of said respective bead cores, characterized by said tire being cured in the configuration such that the neutral contour line of each of said first and second carcass reinforcing ply structures coincides with the respective natural equilibrium curve of said structures.
Description of the Figures Fig. 1 is a radial cross-sectional view of a pneumatic tire made in accordance with the present invention; and -2a-Fig. 2 is a radial cross-sectional view of the tire of Figure 1 when experiencing a lateral force.
Detailed Description of the Invention _ Reerring to Fig, 1, there is illustrated a pneumatic tire lO made in accordance with the present invention. The tire 10 has a circumferentially extending ground engaging tread portion 12 which terminates in a pair of shoulder portions 14,15 at the lateral ends thereof. A pair of sidewall portions 16,17 extend radially inward from said shoulder portions 14,15 respectively terminating in a pair of bead portions 18,19. Each of the bead portions 18,19 have embedded therein a substantially inextensible .~
11 ~4463 bead core 20, 21 respectively. The bead cores 20, 21 in the embodiment illustrated are preferably made of steel wires. A carcass reinforcing ply structure 22 extends from bead portion 18 through sidewall 16, tread portion 12 and sidewall 17 to bead portion 19. The reinforcing ply structure 22 com-prises two reinforcing ply structures 23 and 24.
The carcass reinforcing structure 22 is of the one-up one-down construction, that is, wherein the ends of the axially innermost ply structure 23 are wrapped adjacent the axially innermost surface of each of the bead cores 20, 21 in each of the respective bead areas 18 and 19 and the ends of the axially outermost ply structure 24 is wrapped adjacent the axially outer-most surface of each of the bead cores 20, 21 in each respective bead area 18, 19. In the particular em-bodiment illustrated, the reinforcing ply structures 23 and 24 each comprise one layer of rubber ooated fabric. The fabric comprises of a pIurality of parallel cords which may be made of any material used for rubber reinforcement, for example, and not by way of limitation, rayon, nylon, polyester and steel and may form many desired angles with respect to the mid-circumferential centerplane CP of the tire.
The cords of reinforcing ply structures 23 and 24 form an angle of from about 75 to about 90 with respect to the mid-circumferential centerplane CP.
While the particular embodiment illustrated shows reinforcing ply structures 23 and 24 as having a single layer each, it is understood that each ply structure 23 and 24 may be comprised of any multiple of layers, preferably ply structures 23 and 24 each having the same number of fabric layers.
Placed circumferentially about the radially outermost surface of the carcass ply structure 22 is a tread reinforcing belt structure 28 having two cut reinforcing plies 30, 32 of parallel cords coated with a thin layer of rubber. The cords of plies 30, 5 32 may be comprised of any material used for rubber reinforcement, for example, and not by way of limi-tation, nylon, rayon, steel and aramid. While the belt structure 28 is shown as having two cut plies 30, 32 belt structure 22 may be of any desired con-figuration and be omitted entirely if desired. Thecords of plies 30 and 32 preferabl~ form an angle of from about 15 to 30 with respect to the mid-circum-ferential centerplane CP of the tire and in the particular embodiment illustrated is approximately 21. Preferably the plies 30 and 32 are oriented such that the cords of ply 30 form an anglè equal and opposite to the angle formed by the cords of belt ply 32.
In each of the bead portions 18, 19 there is 20 provided a hard rubber reinforcement 34, 36 - respec-tively which extends radially outward from the respective bead core in between the carcass rein-forcing ply structures 23 and 24. The hard rubber reinforcement 34 and 36 extend radially outward 25 terminating a distance A from the nominal rim diameter NRD of at least twenty-five (25) percent of the car-cass section height CSH, preferably at least thirty (30) percent and in the particular embodiment illustrated the distance A is about thirty-six (36) percent of the 30 maximum carcass section height CSH. For the purposes of this invention, the nominal rim diameter NRD is the distance from the axis of rotation as designated in the size designation of the tire and the maximum carcass section height CSH is the maximum radial dis-35 tance between the neutral contour of the carcass rein-~.,~
forcing structure 22 beneath the tread portion 12and the nominal rim diame-ter NRD. The hard rubber reinforcement 34 and 36 comprises a material having a dynamic modulus of elascity of at least 125 Kg/cm2.
The dynamic modulus being determined by the Goodyear Vibra Tester (ASTM-22331).
The tira 10 is cured in configuration such that the neutral contour line of each of the reinforcing ply structures 23, 24 follow its respective natural equilibrium curve. Preferably the reinforcing ply structures 23 and 24 follow the natural equilibrium curve radially outward to wherein it first meets the belt structure 28.
For the purposes of this invention the neutral contour line of each carcass reinforcing ply structure 23, 24 respectively, is the line located midway be-tween the outermost and innermost reinforcing ply of each reinforcing ply structure 23, 24.
The natural equilibrium curve for each of the reinforcing ply structures 23 and 24 are determined in accor,dance with the~,following relationship:
~0 ~c .e~
Y- I .~ -- P
~ (/Da~ e wherein y is the perpendicular distance from the mid-circumferential plane of radius ~o to any point on the tire carcass for any specified ~ ;
~ is the distance from the axis of rotation to a point on the tire;
~ m is the radius from the axis of rotation to the point on the tire carcass where y is maximum;
4~63 qC is the cured cord angle, the outer angle which the cord makes with the circumference of ; any circle in the circumferential direction of the tire;
~o is the radius from the axis of rotation of the tire to a point determined by an iterative method such that the curve defined by equation (1) will pass through a point ~s, Ys (specified in the shoulder areaj and tangent to a line determined by Ym, ~ b, Yb determined for the carcass structure in the bead area;
s is the distance from the axis of rotation to a point in the shoulder area where the carcass contour deviates from equation (l);
Yb, ~ b is the point at which the carcass : contour deviates from equation (l~;
b is the distance from the axis of rotation . to the point on the tire carcass in the bead area;
~:: Yb is the distance from the mid-circumferential : ; 20 plane of radius ~o to the point on the tire carcass bead area;
The above equation is used when a belt rein-forcing structure 28 is present in the tire 10.
: : When there is no belt reinforcing structure the ~ o term is replaced by the ~ o term which is defined as the radius from the axis of rotation to a point on the tire at the tread center.
For the purposes of this invention, the maxi-mum carcass section width CSW is the maximum distance measured parallel to the axis of rotation of the tire between the neutral contour of the reinforcing struc-ture 22.
::
.~
4~63 During normal operation of a pneumatic tire, the bead area is subject to torsional forces and stress concentrations which can substantially detract from the durability and handling charac-teristics of a tire. This is of particularimportance in tires of radial type construction, that is, a tire in which the cords form an angle of from about 75 to 90 with respect to the mid-; circumferential centerplane. The carcass ply layers of a radial tire do not contribute sub-stantially to the lateral stability of the tire on proved bead durability under lateral forces.
The one-up one-down carcass ply construction provides bead durability and improves the lateral ; 15 stability of the tire during turning maneuvers.
Referring to Fig. 2, there is illustrated the tire 10 undergoing a lateral force. The one-up one-down construction puts one of the reinforcing ply structures 23 or 24 in compression while the other is in tension depending upon which bead portion is being considered. The reinforcing ply structure that is being put under tension adds to the stability of the tire. Curing the tire ln the configuration such that each of the reinforcing ply structures follow its own natural equilibrium curve minimizes the stresses and tension variations in the cords of each ply~structure while at the same time allows the carcass reinforcing ply structures to go into tension as the condition requires improving lateral stability of the tire. A tire made in accordance with the present invention exhibits improved lateral stability and bead durability without adversely affecting the ~ normal performance characteristics of the tire.
-~ Applicant's invention is particularly well suited ~ 35 for radial type tires, that is,tires wherein the 11~4463 : -8-cords of the reinforcing ply structure form an angle from about 75 to 90 with respect to the mid-circumferential plane of the tire, wherein improved lateral stability is desired~
While certain representative embodiments and : details have been shown for purposes if illustrat-ing the invention, it will be apparent to those skilled in the art that various changes and modifi-cations may be made therein without departing from the spirit or scope of the invention.
:
::
."~
Back~round of the Invention This invention relates to a pneumatic tire, and more particularly, to a novel and improved pneumatic - 10 tire.
It is well known in the prior art that it is desirable to cure a tire in a configuration such that the carcass ply structure follows the natural equili-; brium curve for at least a portion of its length. The natural equilibrium curve is the shape the carcass plystructure tends to assume as prescribed by its cord path and dimensions when mounted on the rim for which it is designed and inflated to design inflation pres-sure. This concept is thoroughly discussed and ex-plained in "Mathematics Underlying The Design ofPneumatic Tire" by John F. Purdy. U.S. Patent Nos.
3,757,844; 3,910,336; and 3,938,575 are illustrative of the prior art wherein at least a portion of the carcass ply structure follows the natural equilibrium curve.
During normal operation of a pneumatic tire, the ~ bead area is subject to torsional forces and stress - concentrations which can substantially detract from ~; the durability, handling and overall performance of the tire. The prior art does not take into account these forces. In the prior art the carcass ply layers are all immediately adjacent one another or are dis-posed at positions symmetrically about the natural equilibrium curve in the bead area. The carcass ply structure does not contribute to the lateral stability ~, .~ ~
of the tire or improve bead durability under la~eral forces.
Applicant has designed an improved pneumatic tire which has the advantages of a tire having the carcass plies located at the natural equilibrium curve while at the same time providing improved handling and durability.
Summary of the Invention In accordance with the present invention, there is provided a pneumatic tire comprising a ground engaging tread portion, said tread portion terminating in a pair of shoulder portions, one at each lateral end thereof, a pair of sidewall portions extending radially inward from said shoulder portions terminating in a pair of bead portions respectively, each of said bead portions having at least one inextensible bead core, a first carcass reinforcing ply structure extending from bead core to bead core, the terminal ends of said first carcass ply structure each being wrapped adjacent the axially inner surface of each respective bead core and, a second carcass reinforcing ply structure extending from bead core to bead core the terminal ends of said carcass reinforced ply structure being wrapped adjacent the axially outermost surface of said respective bead cores, characterized by said tire being cured in the configuration such that the neutral contour line of each of said first and second carcass reinforcing ply structures coincides with the respective natural equilibrium curve of said structures.
Description of the Figures Fig. 1 is a radial cross-sectional view of a pneumatic tire made in accordance with the present invention; and -2a-Fig. 2 is a radial cross-sectional view of the tire of Figure 1 when experiencing a lateral force.
Detailed Description of the Invention _ Reerring to Fig, 1, there is illustrated a pneumatic tire lO made in accordance with the present invention. The tire 10 has a circumferentially extending ground engaging tread portion 12 which terminates in a pair of shoulder portions 14,15 at the lateral ends thereof. A pair of sidewall portions 16,17 extend radially inward from said shoulder portions 14,15 respectively terminating in a pair of bead portions 18,19. Each of the bead portions 18,19 have embedded therein a substantially inextensible .~
11 ~4463 bead core 20, 21 respectively. The bead cores 20, 21 in the embodiment illustrated are preferably made of steel wires. A carcass reinforcing ply structure 22 extends from bead portion 18 through sidewall 16, tread portion 12 and sidewall 17 to bead portion 19. The reinforcing ply structure 22 com-prises two reinforcing ply structures 23 and 24.
The carcass reinforcing structure 22 is of the one-up one-down construction, that is, wherein the ends of the axially innermost ply structure 23 are wrapped adjacent the axially innermost surface of each of the bead cores 20, 21 in each of the respective bead areas 18 and 19 and the ends of the axially outermost ply structure 24 is wrapped adjacent the axially outer-most surface of each of the bead cores 20, 21 in each respective bead area 18, 19. In the particular em-bodiment illustrated, the reinforcing ply structures 23 and 24 each comprise one layer of rubber ooated fabric. The fabric comprises of a pIurality of parallel cords which may be made of any material used for rubber reinforcement, for example, and not by way of limitation, rayon, nylon, polyester and steel and may form many desired angles with respect to the mid-circumferential centerplane CP of the tire.
The cords of reinforcing ply structures 23 and 24 form an angle of from about 75 to about 90 with respect to the mid-circumferential centerplane CP.
While the particular embodiment illustrated shows reinforcing ply structures 23 and 24 as having a single layer each, it is understood that each ply structure 23 and 24 may be comprised of any multiple of layers, preferably ply structures 23 and 24 each having the same number of fabric layers.
Placed circumferentially about the radially outermost surface of the carcass ply structure 22 is a tread reinforcing belt structure 28 having two cut reinforcing plies 30, 32 of parallel cords coated with a thin layer of rubber. The cords of plies 30, 5 32 may be comprised of any material used for rubber reinforcement, for example, and not by way of limi-tation, nylon, rayon, steel and aramid. While the belt structure 28 is shown as having two cut plies 30, 32 belt structure 22 may be of any desired con-figuration and be omitted entirely if desired. Thecords of plies 30 and 32 preferabl~ form an angle of from about 15 to 30 with respect to the mid-circum-ferential centerplane CP of the tire and in the particular embodiment illustrated is approximately 21. Preferably the plies 30 and 32 are oriented such that the cords of ply 30 form an anglè equal and opposite to the angle formed by the cords of belt ply 32.
In each of the bead portions 18, 19 there is 20 provided a hard rubber reinforcement 34, 36 - respec-tively which extends radially outward from the respective bead core in between the carcass rein-forcing ply structures 23 and 24. The hard rubber reinforcement 34 and 36 extend radially outward 25 terminating a distance A from the nominal rim diameter NRD of at least twenty-five (25) percent of the car-cass section height CSH, preferably at least thirty (30) percent and in the particular embodiment illustrated the distance A is about thirty-six (36) percent of the 30 maximum carcass section height CSH. For the purposes of this invention, the nominal rim diameter NRD is the distance from the axis of rotation as designated in the size designation of the tire and the maximum carcass section height CSH is the maximum radial dis-35 tance between the neutral contour of the carcass rein-~.,~
forcing structure 22 beneath the tread portion 12and the nominal rim diame-ter NRD. The hard rubber reinforcement 34 and 36 comprises a material having a dynamic modulus of elascity of at least 125 Kg/cm2.
The dynamic modulus being determined by the Goodyear Vibra Tester (ASTM-22331).
The tira 10 is cured in configuration such that the neutral contour line of each of the reinforcing ply structures 23, 24 follow its respective natural equilibrium curve. Preferably the reinforcing ply structures 23 and 24 follow the natural equilibrium curve radially outward to wherein it first meets the belt structure 28.
For the purposes of this invention the neutral contour line of each carcass reinforcing ply structure 23, 24 respectively, is the line located midway be-tween the outermost and innermost reinforcing ply of each reinforcing ply structure 23, 24.
The natural equilibrium curve for each of the reinforcing ply structures 23 and 24 are determined in accor,dance with the~,following relationship:
~0 ~c .e~
Y- I .~ -- P
~ (/Da~ e wherein y is the perpendicular distance from the mid-circumferential plane of radius ~o to any point on the tire carcass for any specified ~ ;
~ is the distance from the axis of rotation to a point on the tire;
~ m is the radius from the axis of rotation to the point on the tire carcass where y is maximum;
4~63 qC is the cured cord angle, the outer angle which the cord makes with the circumference of ; any circle in the circumferential direction of the tire;
~o is the radius from the axis of rotation of the tire to a point determined by an iterative method such that the curve defined by equation (1) will pass through a point ~s, Ys (specified in the shoulder areaj and tangent to a line determined by Ym, ~ b, Yb determined for the carcass structure in the bead area;
s is the distance from the axis of rotation to a point in the shoulder area where the carcass contour deviates from equation (l);
Yb, ~ b is the point at which the carcass : contour deviates from equation (l~;
b is the distance from the axis of rotation . to the point on the tire carcass in the bead area;
~:: Yb is the distance from the mid-circumferential : ; 20 plane of radius ~o to the point on the tire carcass bead area;
The above equation is used when a belt rein-forcing structure 28 is present in the tire 10.
: : When there is no belt reinforcing structure the ~ o term is replaced by the ~ o term which is defined as the radius from the axis of rotation to a point on the tire at the tread center.
For the purposes of this invention, the maxi-mum carcass section width CSW is the maximum distance measured parallel to the axis of rotation of the tire between the neutral contour of the reinforcing struc-ture 22.
::
.~
4~63 During normal operation of a pneumatic tire, the bead area is subject to torsional forces and stress concentrations which can substantially detract from the durability and handling charac-teristics of a tire. This is of particularimportance in tires of radial type construction, that is, a tire in which the cords form an angle of from about 75 to 90 with respect to the mid-; circumferential centerplane. The carcass ply layers of a radial tire do not contribute sub-stantially to the lateral stability of the tire on proved bead durability under lateral forces.
The one-up one-down carcass ply construction provides bead durability and improves the lateral ; 15 stability of the tire during turning maneuvers.
Referring to Fig. 2, there is illustrated the tire 10 undergoing a lateral force. The one-up one-down construction puts one of the reinforcing ply structures 23 or 24 in compression while the other is in tension depending upon which bead portion is being considered. The reinforcing ply structure that is being put under tension adds to the stability of the tire. Curing the tire ln the configuration such that each of the reinforcing ply structures follow its own natural equilibrium curve minimizes the stresses and tension variations in the cords of each ply~structure while at the same time allows the carcass reinforcing ply structures to go into tension as the condition requires improving lateral stability of the tire. A tire made in accordance with the present invention exhibits improved lateral stability and bead durability without adversely affecting the ~ normal performance characteristics of the tire.
-~ Applicant's invention is particularly well suited ~ 35 for radial type tires, that is,tires wherein the 11~4463 : -8-cords of the reinforcing ply structure form an angle from about 75 to 90 with respect to the mid-circumferential plane of the tire, wherein improved lateral stability is desired~
While certain representative embodiments and : details have been shown for purposes if illustrat-ing the invention, it will be apparent to those skilled in the art that various changes and modifi-cations may be made therein without departing from the spirit or scope of the invention.
:
::
."~
Claims (5)
WE CLAIM:
1. A pneumatic tire comprising:
a ground engaging tread portion, said tread portion terminating in a pair of shoulder portions, one at each lateral end thereof, a pair of sidewall portions extending radially inward from said shoulder portions termi-nating in a pair of bead portions respectively, each of said bead portions having at least one inextensible bead core, a first carcass reinforcing ply structure extending from bead core to bead core, the terminal ends of said first carcass ply structure each being wrapped adjacent the axially inner surface of each respective bead core and, a second carcass reinforcing ply structure extending from bead core to bead core the terminal ends of said carcass reinforced ply structure being wrapped adjacent the axially outermost surface of said respective bead cores, characterized by said tire being cured in the configuration such that the neutral contour line of each of said first and second carcass reinforcing ply structures coincides with the respective natural equilibrium curve of said structures.
a ground engaging tread portion, said tread portion terminating in a pair of shoulder portions, one at each lateral end thereof, a pair of sidewall portions extending radially inward from said shoulder portions termi-nating in a pair of bead portions respectively, each of said bead portions having at least one inextensible bead core, a first carcass reinforcing ply structure extending from bead core to bead core, the terminal ends of said first carcass ply structure each being wrapped adjacent the axially inner surface of each respective bead core and, a second carcass reinforcing ply structure extending from bead core to bead core the terminal ends of said carcass reinforced ply structure being wrapped adjacent the axially outermost surface of said respective bead cores, characterized by said tire being cured in the configuration such that the neutral contour line of each of said first and second carcass reinforcing ply structures coincides with the respective natural equilibrium curve of said structures.
2. A tire according to claim 1 further charac-terized by said first and second carcass reinforcing ply structures comprising one layer of cord rein-forcement.
3. A tire according to claim 2 further characterized by the cords of said layers forming an angle in a range of from 75° to 90° with respect to the mid-circumferential centerplane of the tire.
4. A tire according to claim 1 further characterized by a circumferentially extending belt reinforcing structure in a ground engaging tread portion radially outward of said first and second carcass reinforcing ply structures.
5. A tire according to claim 1 further characterized by each of said bead portions further including a hard rubber reinforcement positioned between said first and second reinforcing structures and extending radially outward from said bead cores and terminating at a distance from the nominal rim diameter of at least twenty-five percent (25%) of the carcass section height.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13338780A | 1980-03-24 | 1980-03-24 | |
| US133,387 | 1980-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1144463A true CA1144463A (en) | 1983-04-12 |
Family
ID=22458368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000372470A Expired CA1144463A (en) | 1980-03-24 | 1981-03-06 | Pneumatic tire |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS56146402A (en) |
| AU (1) | AU537768B2 (en) |
| BR (1) | BR8101623A (en) |
| CA (1) | CA1144463A (en) |
| DE (1) | DE3108886A1 (en) |
| FR (1) | FR2478545A1 (en) |
| GB (1) | GB2074954B (en) |
| IT (1) | IT1135703B (en) |
| MX (1) | MX151991A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58206401A (en) * | 1982-05-27 | 1983-12-01 | Toyo Tire & Rubber Co Ltd | Radial tire for passenger car with high angle belt ply |
| US4815511A (en) * | 1986-03-18 | 1989-03-28 | The Goodyear Tire & Rubber Company | All-season high-performance radial-ply passenger pneumatic tire |
| FR2672546A1 (en) * | 1991-02-08 | 1992-08-14 | Michelin & Cie | A TIRE AND RIM ASSEMBLY FOR AVOIDING THE DISCHARGE OF TIRE SADDLES. |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2120421A5 (en) * | 1970-12-30 | 1972-08-18 | Michelin & Cie | |
| FR2224313B1 (en) * | 1973-04-09 | 1976-05-21 | Michelin & Cie | |
| FR2281239A1 (en) * | 1974-08-05 | 1976-03-05 | Michelin & Cie | IMPROVEMENTS TO TIRE PACKAGES |
| JPS5464303A (en) * | 1977-10-31 | 1979-05-24 | Bridgestone Corp | Radial tire |
| FR2437305A1 (en) * | 1978-09-28 | 1980-04-25 | Gazuit Georges | Pneumatic tyre with shallow form and wide tread - has high flexibility and shear strength with low heat production |
-
1981
- 1981-02-25 MX MX186124A patent/MX151991A/en unknown
- 1981-02-26 AU AU67668/81A patent/AU537768B2/en not_active Ceased
- 1981-02-27 GB GB8106352A patent/GB2074954B/en not_active Expired
- 1981-03-06 CA CA000372470A patent/CA1144463A/en not_active Expired
- 1981-03-09 DE DE19813108886 patent/DE3108886A1/en not_active Withdrawn
- 1981-03-19 BR BR8101623A patent/BR8101623A/en unknown
- 1981-03-19 JP JP3883681A patent/JPS56146402A/en active Pending
- 1981-03-23 FR FR8105712A patent/FR2478545A1/en active Granted
- 1981-03-23 IT IT20668/81A patent/IT1135703B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| DE3108886A1 (en) | 1982-03-04 |
| BR8101623A (en) | 1981-09-29 |
| AU6766881A (en) | 1981-10-01 |
| GB2074954A (en) | 1981-11-11 |
| IT1135703B (en) | 1986-08-27 |
| MX151991A (en) | 1985-05-23 |
| FR2478545B1 (en) | 1984-04-27 |
| FR2478545A1 (en) | 1981-09-25 |
| JPS56146402A (en) | 1981-11-13 |
| AU537768B2 (en) | 1984-07-12 |
| GB2074954B (en) | 1984-04-26 |
| IT8120668A0 (en) | 1981-03-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4842682A (en) | Heavy duty low-section pneumatic radial tire and a process for manufacturing the same | |
| AU605964B2 (en) | Pneumatic tire | |
| CA1052247A (en) | Radial ply pneumatic tire | |
| US5435369A (en) | Truck tire with split overlay | |
| US4813467A (en) | Radial ply aircraft tire and rim | |
| EP0101400A2 (en) | A pneumatic tire | |
| US4854362A (en) | Pneumatic tire | |
| US4947915A (en) | Radial ply tire | |
| CA1072869A (en) | Tire and rim assembly | |
| US4832103A (en) | Pneumatic tire having plural aramid carcass plies | |
| EP0313500B1 (en) | Pneumatic tires | |
| CA2105631A1 (en) | Belt reinforcing structure for a pneumatic tire | |
| CA1055372A (en) | Earthmover tire and rim assembly | |
| CA1105818A (en) | Tire carcass structure | |
| EP0317487B2 (en) | Radial-ply pneumatic tire with reverse curvature carcass ply | |
| CA1162134A (en) | Pneumatic tire and method for making same | |
| JPH03121905A (en) | Flat pneumatic radial tire | |
| CA1144463A (en) | Pneumatic tire | |
| US4733706A (en) | Pneumatic tire | |
| US3613762A (en) | Fabric inserts for filament wound aircraft tires | |
| GB1579605A (en) | Bias tyre with embedded wire breakers | |
| US4890660A (en) | Pneumatic tire having a reversed bead tie-in | |
| JPH03157204A (en) | Pneumatic radial tire | |
| EP0161202B1 (en) | A pneumatic tire | |
| CA1209022A (en) | Heavy duty low-section pneumatic radial tire and a process for manufacturing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |