CA1235987A - Tire casing structure - Google Patents
Tire casing structureInfo
- Publication number
- CA1235987A CA1235987A CA000483516A CA483516A CA1235987A CA 1235987 A CA1235987 A CA 1235987A CA 000483516 A CA000483516 A CA 000483516A CA 483516 A CA483516 A CA 483516A CA 1235987 A CA1235987 A CA 1235987A
- Authority
- CA
- Canada
- Prior art keywords
- puncture
- sealing layer
- tire casing
- cords
- inside surface
- 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
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
- B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
-
- 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
- B60C19/00—Tyre parts or constructions not otherwise provided for
- B60C19/12—Puncture preventing arrangements
-
- 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
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/02—Inflatable pneumatic tyres or inner tubes having separate inflatable inserts, e.g. with inner tubes; Means for lubricating, venting, preventing relative movement between tyre and inner tube
- B60C5/04—Shape or construction of inflatable inserts
- B60C5/08—Shape or construction of inflatable inserts having reinforcing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
- B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
- B29D2030/0686—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre
- B29D2030/0695—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre the sealant being in the form of one wide strip, e.g. a patch
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A tire casing is provided herein which includes a puncture-sealing layer attached to the inside surface thereof. The puncture-sealing layer is made of interwoven flexible cords, both the cords and the sealing layer being rubberized. Because of the flexibility of the interwoven cords and the elasticity of the rubber, once a sharp object pierces the tire casing and the puncture-sealing layer, the rubberized cords will work tightly to bind the sharp object so as to prevent air contained in the tire casing from leaking out.
A tire casing is provided herein which includes a puncture-sealing layer attached to the inside surface thereof. The puncture-sealing layer is made of interwoven flexible cords, both the cords and the sealing layer being rubberized. Because of the flexibility of the interwoven cords and the elasticity of the rubber, once a sharp object pierces the tire casing and the puncture-sealing layer, the rubberized cords will work tightly to bind the sharp object so as to prevent air contained in the tire casing from leaking out.
Description
~LZ359~
This invention relates to a tire casing structure, and particularly concerns a tire casing provided with a novel puncture-sealing layer.
The development of more durable and safe tires plays an important role in the field of automotive parts. Many car accidents, sometimes accompanied by very serious injuries and even death, are caused by the puncturing and consequent blow-out of tires. Even if such an accident does not lead to injury, it is still rather troublesome to remove the blown-out tire and to install the spare tire or to make emergency repairs, the extent of which depends upon the degree of the puncture.
Prior tire casing structures of the general type are shown in Iknayan, U.S. Patent No. 2,699,194 in which an inner tube has spaced-apart rubberized fabric plies. Each ply comprised parallel cords which extend in the same direction. One of the fabric cords had cords extending in one direction while the other ply had cords extending at 50 relative to that first direction.
This prior art utilized the tube to span a brake in the casing and thus to prevent the tire from blowing out.
Villard, U.S. Patent No. 1,572,053 taught a shoe therein with its original inner surface outermost, the shoe consisting of a body made substantially of elastic material and coextensive with the inner surface of the casing. Should the air ~ithin the tire exhaust, the compressed shoe will maintain the tire in an operative condition.
A . ;:
12359~
Pixley, U.S. Patent No. 1,431,596 disclosed an inner tube for tires, which inner tube was reinforced by a suitable number of layers of fabric throughout the greater portion of its transverse circumference, the reinforcing layers being arranged so that there is a greater thickness of reinforcement and rubber within the zone which is disposed adjacent to the thread of the shoe or casing.
Murphy, U.S. Patent No. 919,915 disclosed an inner tube for use in tires for automobiles. The tube body was formed of one or more layers of woven, partially-elas-tic fabric with a rubber compound being forced into the meshes of the fabric and forming an outer and an inner covering for the fabric.
Spancer, U.K. Patent No. 15640 also ~isclosed an inner tube for the wheels of road vehicles. The inner tube taught by Spancer was characterized by the rubber at or about the ends or edges of the strip or strip of canvas or fabric being thickened and the intervening circumferential strip consisting of rubber only made as thin as possible consistent with the necessary strength.
Although the above-described prior patents all were a success in providing a necessary strength for the inner tube, they still suffered the same problem that, once the inner tube was pierced through by a pointed object, no puncture-sealing layer can be effected around the pierced object so as tightly to bind the object without air-pressure escaping therefrom.
1235~
Therefore, emergency operation was still needed for safety purposes.
An object of a general aspect of this invention is to provide a tire casing having a puncture-sealing layer which can automatically seal a puncture by having rubberized interwoven flexible cords that engage around a puncturing object.
An object of another aspect of this invention is to provide a novel tire casing, which can run a long distance a~ter being punctured by a sharp object.
By one broad aspect of this invention, a tire casing is provided having an inside surface, comprising a tubular puncture-sealing layer extending over the inside surface thereof, the tubular puncture-sealing layer being made of interwoven flexible cords both the layer and the cords being rubberized and secured to the inside surface; whereby an object puncturing the tire casing and the tubular puncture-sealing layer and projecting between the cords will be tightly engaged by the cord~ around the object, thereby to seal the puncture with substantially only a small amount of air escaping therefrom.
It is preferred that the puncture-sealing layer be adhesively connected to the inside surface of the tire casing.
The puncture-sealing layer preferably further comprises an annular, all-rubber portion integrally formed along the opposing edges of the puncture-sealing layer during rubberization thereof, for positioning directly over a rim area.
?~
lZ3598~
In the accompanying drawings, Fig. 1 is a perspective view of a tire according to one embodiment oE this inventi,on, with several nails inserted therein;
Fig. 2 is a cross-section view of another embodiment of the tire casing according to this invention;
Fig. 3 is a cross-section view of yet another embodiment of the tire casing;
Fig. 4 is a fragmentary sectional view taken on lines 4-4 of Fig. 1, showing a tire casing of an embodiment of this invention having been punctured by a nail; and Fig. 5 is a schematic view showing the sealing effect of rubberized interwoven cords when a nail punctures through the puncture-sealing layer of the tire casing according to an embodiment of this invention.
Referring now to Figs. 1 and 2, a preferred embodiment of a tire casing 1 is shown provided with a puncture-sealing layer 2 according to an embodiment of this invention.
As illustrated in the drawings, the puncture-sealing layer 2 is made of flexible interwoven cords 3 (as best seen in Fig. 5), which are formed in a sheet and are rubberized into a tubular shape adapted to be secured to the inner wall of the tire ca~ing 1 with or without applying an adhesive therebetween since the puncture-sealing layer 2 will be stretched tightly to contact the inner wall of the tire casing 1 after being inflated. The cords A
~Z35~
3 selected to be interwoven into the sheet must be flexible and tough so that once they are interwoven and ruhberized, a desirable cohesive force in the woven cords 3 is present.
The interwoven cord-sheet is rubberized into a tubular form and is disposed within the tire casing 1. When the puncture-sealing layer 2 is inflated therein, it will automatically be combined with the inside surface of the casing 1.
As seen in Fig. 3 and Fig. 4 it is ~elieved -that when a sharp object, illustrated here as a nail 6, pierces the -tire 10 casing 1 and the puncture-sealing layer 2, at the moment the sharp object pierces the casing, some air will leak out, and immediately the puncture-sealing layer 2 will work to seal the opening. As is better shown in Fig. 5, the rubberized interwoven cords 3 can rapidly bind the nail 6 tightly. This rapid binding is due to the flexibility of the interwoven cords, since the high elasticity of the rubber causes almost instantaneous recovery to its original state after being punctured and locally deformed by such a nail 6. The result is that the nail 6 is snugly gripped by the puncture-sealing layer 2 of the rubberized cords 3 as shown in Fig. 4.
Referring to Fig. 3 in which another embodiment of this invention is shown, the puncture-sealing layer 2 includes an annular portion 20 integrally formed along the opposing edges 21 1Z3598t7 and 22 of the puncture-sealing layer during rubberization operation thereof. This annular portion 20 is constituted entirely of rubber material and is to be directly positioned over the rim area 5 because there is little possibility that the annular portion 20 will be punctured by any sharp objects.
A test to determine the usefulness of the invention is conducted by the following procedure:
seven nails with lengths of at least 1 1/2" are inserted into a tire casing which was mounted on the rear wheel of a 10 motorcycle, e.g. that known as a SCOOTER 90 motorcycle. The distance between each adjacent two nails was less than 20 cm, and the load of the motorcycle was 130 kg (two persons riding thereon). The tire casing to be tested was inflated to a pressure of 3 kg/cm2. After a long-distance ride of 37 miles, the tire pressure was slightly lower than 3 kg/cm2 due to a fact that a small amount of air leakage occurred when pulling out the nozzles of the pneumatic pump and the pressure gauge from the tire.
A ~ T ' ~
This invention relates to a tire casing structure, and particularly concerns a tire casing provided with a novel puncture-sealing layer.
The development of more durable and safe tires plays an important role in the field of automotive parts. Many car accidents, sometimes accompanied by very serious injuries and even death, are caused by the puncturing and consequent blow-out of tires. Even if such an accident does not lead to injury, it is still rather troublesome to remove the blown-out tire and to install the spare tire or to make emergency repairs, the extent of which depends upon the degree of the puncture.
Prior tire casing structures of the general type are shown in Iknayan, U.S. Patent No. 2,699,194 in which an inner tube has spaced-apart rubberized fabric plies. Each ply comprised parallel cords which extend in the same direction. One of the fabric cords had cords extending in one direction while the other ply had cords extending at 50 relative to that first direction.
This prior art utilized the tube to span a brake in the casing and thus to prevent the tire from blowing out.
Villard, U.S. Patent No. 1,572,053 taught a shoe therein with its original inner surface outermost, the shoe consisting of a body made substantially of elastic material and coextensive with the inner surface of the casing. Should the air ~ithin the tire exhaust, the compressed shoe will maintain the tire in an operative condition.
A . ;:
12359~
Pixley, U.S. Patent No. 1,431,596 disclosed an inner tube for tires, which inner tube was reinforced by a suitable number of layers of fabric throughout the greater portion of its transverse circumference, the reinforcing layers being arranged so that there is a greater thickness of reinforcement and rubber within the zone which is disposed adjacent to the thread of the shoe or casing.
Murphy, U.S. Patent No. 919,915 disclosed an inner tube for use in tires for automobiles. The tube body was formed of one or more layers of woven, partially-elas-tic fabric with a rubber compound being forced into the meshes of the fabric and forming an outer and an inner covering for the fabric.
Spancer, U.K. Patent No. 15640 also ~isclosed an inner tube for the wheels of road vehicles. The inner tube taught by Spancer was characterized by the rubber at or about the ends or edges of the strip or strip of canvas or fabric being thickened and the intervening circumferential strip consisting of rubber only made as thin as possible consistent with the necessary strength.
Although the above-described prior patents all were a success in providing a necessary strength for the inner tube, they still suffered the same problem that, once the inner tube was pierced through by a pointed object, no puncture-sealing layer can be effected around the pierced object so as tightly to bind the object without air-pressure escaping therefrom.
1235~
Therefore, emergency operation was still needed for safety purposes.
An object of a general aspect of this invention is to provide a tire casing having a puncture-sealing layer which can automatically seal a puncture by having rubberized interwoven flexible cords that engage around a puncturing object.
An object of another aspect of this invention is to provide a novel tire casing, which can run a long distance a~ter being punctured by a sharp object.
By one broad aspect of this invention, a tire casing is provided having an inside surface, comprising a tubular puncture-sealing layer extending over the inside surface thereof, the tubular puncture-sealing layer being made of interwoven flexible cords both the layer and the cords being rubberized and secured to the inside surface; whereby an object puncturing the tire casing and the tubular puncture-sealing layer and projecting between the cords will be tightly engaged by the cord~ around the object, thereby to seal the puncture with substantially only a small amount of air escaping therefrom.
It is preferred that the puncture-sealing layer be adhesively connected to the inside surface of the tire casing.
The puncture-sealing layer preferably further comprises an annular, all-rubber portion integrally formed along the opposing edges of the puncture-sealing layer during rubberization thereof, for positioning directly over a rim area.
?~
lZ3598~
In the accompanying drawings, Fig. 1 is a perspective view of a tire according to one embodiment oE this inventi,on, with several nails inserted therein;
Fig. 2 is a cross-section view of another embodiment of the tire casing according to this invention;
Fig. 3 is a cross-section view of yet another embodiment of the tire casing;
Fig. 4 is a fragmentary sectional view taken on lines 4-4 of Fig. 1, showing a tire casing of an embodiment of this invention having been punctured by a nail; and Fig. 5 is a schematic view showing the sealing effect of rubberized interwoven cords when a nail punctures through the puncture-sealing layer of the tire casing according to an embodiment of this invention.
Referring now to Figs. 1 and 2, a preferred embodiment of a tire casing 1 is shown provided with a puncture-sealing layer 2 according to an embodiment of this invention.
As illustrated in the drawings, the puncture-sealing layer 2 is made of flexible interwoven cords 3 (as best seen in Fig. 5), which are formed in a sheet and are rubberized into a tubular shape adapted to be secured to the inner wall of the tire ca~ing 1 with or without applying an adhesive therebetween since the puncture-sealing layer 2 will be stretched tightly to contact the inner wall of the tire casing 1 after being inflated. The cords A
~Z35~
3 selected to be interwoven into the sheet must be flexible and tough so that once they are interwoven and ruhberized, a desirable cohesive force in the woven cords 3 is present.
The interwoven cord-sheet is rubberized into a tubular form and is disposed within the tire casing 1. When the puncture-sealing layer 2 is inflated therein, it will automatically be combined with the inside surface of the casing 1.
As seen in Fig. 3 and Fig. 4 it is ~elieved -that when a sharp object, illustrated here as a nail 6, pierces the -tire 10 casing 1 and the puncture-sealing layer 2, at the moment the sharp object pierces the casing, some air will leak out, and immediately the puncture-sealing layer 2 will work to seal the opening. As is better shown in Fig. 5, the rubberized interwoven cords 3 can rapidly bind the nail 6 tightly. This rapid binding is due to the flexibility of the interwoven cords, since the high elasticity of the rubber causes almost instantaneous recovery to its original state after being punctured and locally deformed by such a nail 6. The result is that the nail 6 is snugly gripped by the puncture-sealing layer 2 of the rubberized cords 3 as shown in Fig. 4.
Referring to Fig. 3 in which another embodiment of this invention is shown, the puncture-sealing layer 2 includes an annular portion 20 integrally formed along the opposing edges 21 1Z3598t7 and 22 of the puncture-sealing layer during rubberization operation thereof. This annular portion 20 is constituted entirely of rubber material and is to be directly positioned over the rim area 5 because there is little possibility that the annular portion 20 will be punctured by any sharp objects.
A test to determine the usefulness of the invention is conducted by the following procedure:
seven nails with lengths of at least 1 1/2" are inserted into a tire casing which was mounted on the rear wheel of a 10 motorcycle, e.g. that known as a SCOOTER 90 motorcycle. The distance between each adjacent two nails was less than 20 cm, and the load of the motorcycle was 130 kg (two persons riding thereon). The tire casing to be tested was inflated to a pressure of 3 kg/cm2. After a long-distance ride of 37 miles, the tire pressure was slightly lower than 3 kg/cm2 due to a fact that a small amount of air leakage occurred when pulling out the nozzles of the pneumatic pump and the pressure gauge from the tire.
A ~ T ' ~
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A tire casing having an inside surface, comprising a tubular puncture-sealing layer extending over the inside surface thereof, said tubular puncture-sealing layer being made of interwoven flexible cords, both said layer and said cords being rubberized and secured to said inside surface; whereby an object puncturing the tire casing and said tubular puncture-sealing layer and projecting between said cords will be tightly engaged by said cords around said object, thereby to seal the puncture with substantially only a small amount of air escaping therefrom.
2. The tire casing according to Claim 1 wherein said puncture-sealing layer is adhesively connected to said inside surface of said tire casing.
3. The tire casing according to Claim 1 wherein said puncture-sealing layer further comprises an annular, all-rubber portion integrally formed along the opposing edges of said puncture-sealing layer during rubberization thereof, for positioning directly over a rim area.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA854221A ZA854221B (en) | 1985-06-04 | 1985-06-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1235987A true CA1235987A (en) | 1988-05-03 |
Family
ID=25577933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000483516A Expired CA1235987A (en) | 1985-06-04 | 1985-06-07 | Tire casing structure |
Country Status (7)
| Country | Link |
|---|---|
| AU (1) | AU570323B2 (en) |
| CA (1) | CA1235987A (en) |
| DE (2) | DE3520245A1 (en) |
| FR (1) | FR2583349B3 (en) |
| GB (1) | GB2176157B (en) |
| NL (1) | NL8501714A (en) |
| ZA (1) | ZA854221B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19925658C2 (en) * | 1999-06-04 | 2002-04-18 | Andreas Zucker | Device for automatic sample preparation and its use |
| US8387672B2 (en) * | 2010-03-18 | 2013-03-05 | The Goodyear Tire & Rubber Company | Pneumatic tire with built-in sealant layer composite |
| WO2014060862A1 (en) * | 2012-10-18 | 2014-04-24 | Kordsa Global Endustriyel Iplik Ve Kord Bezi Sanayi Ve Ticaret Anonim Sirketi | A self-sealing cap strip |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US919915A (en) * | 1908-06-12 | 1909-04-27 | Caroline O Prince | Tube. |
| GB190915750A (en) * | 1909-07-06 | 1909-11-18 | Albert Gough | Improvements in Pneumatic Tyres. |
| GB379116A (en) * | 1931-09-21 | 1932-08-25 | Frank Galloway Carnahan | Puncture self-sealing inner tubes |
| DE905462C (en) * | 1952-02-02 | 1954-03-01 | Dunlop Rubber Co | Air hose for vehicle tires |
| DE3318440A1 (en) * | 1983-05-20 | 1984-11-22 | Maria Soledad 6000 Frankfurt Rubio | Pneumatic tyre with hard plastics insert for cars, bicycles and other vehicles |
-
1985
- 1985-06-04 AU AU43280/85A patent/AU570323B2/en not_active Ceased
- 1985-06-04 ZA ZA854221A patent/ZA854221B/xx unknown
- 1985-06-05 DE DE19853520245 patent/DE3520245A1/en not_active Withdrawn
- 1985-06-05 DE DE8516510U patent/DE8516510U1/de not_active Expired
- 1985-06-07 CA CA000483516A patent/CA1235987A/en not_active Expired
- 1985-06-07 GB GB08514406A patent/GB2176157B/en not_active Expired
- 1985-06-13 NL NL8501714A patent/NL8501714A/en not_active Application Discontinuation
- 1985-06-17 FR FR8509521A patent/FR2583349B3/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE8516510U1 (de) | 1986-12-04 |
| FR2583349A3 (en) | 1986-12-19 |
| GB2176157A (en) | 1986-12-17 |
| NL8501714A (en) | 1987-01-02 |
| ZA854221B (en) | 1985-12-09 |
| AU4328085A (en) | 1986-12-11 |
| AU570323B2 (en) | 1988-03-10 |
| GB8514406D0 (en) | 1985-07-10 |
| DE3520245A1 (en) | 1986-12-11 |
| GB2176157B (en) | 1988-12-21 |
| FR2583349B3 (en) | 1987-08-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |