CA1183438A - Pneumatic tyre for heavy loads - Google Patents
Pneumatic tyre for heavy loadsInfo
- Publication number
- CA1183438A CA1183438A CA000409420A CA409420A CA1183438A CA 1183438 A CA1183438 A CA 1183438A CA 000409420 A CA000409420 A CA 000409420A CA 409420 A CA409420 A CA 409420A CA 1183438 A CA1183438 A CA 1183438A
- Authority
- CA
- Canada
- Prior art keywords
- tread width
- carcass
- tread
- pneumatic tyre
- tyre
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/01—Shape of the shoulders between tread and sidewall, e.g. rounded, stepped or cantilevered
-
- 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
-
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/01—Shape of the shoulders between tread and sidewall, e.g. rounded, stepped or cantilevered
- B60C2011/013—Shape of the shoulders between tread and sidewall, e.g. rounded, stepped or cantilevered provided with a recessed portion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
Abstract of the Disclosure A pneumatic tyre for heavy loads comprises an air-tight inner panel, a carcass, a belt, a tread, side walls and a tyre base. The carcass is arranged in the line of action of one of the forces present in the event of loading amounting to between 30 and 50% of the load rating. For a projecting length of between 5 and 20% of the tread width, the belt ends in a region of from 5 to 20% of the tread width that tapers on both sides of the tread width.
Description
~L8~
This invention relates to a pneumatic tyre for heavy loads consisting of an air-tight inner panel, a carcass, a belt, a tread, side walls and a tyre base.
It has been found that radial lorry tyres of S conventional construction are not suitable for heavy-duty operation under harsh conditions such as can occur for example in the event of excessive overloading (up to 200%) or inadequate air pressure. Ihis is because radial tyres of conventional construction are primarily designed for relatively high speeds and long motorway runs. Under harsh condit ons J tyres of this type fail after only a few thousand ~ilometres.
The object of the present invention is to provide a pneumatic tyre for heavy loads which, even in the event of adverse stressing by road surfaces, overloading ~nd poor maintenance (air pressure), still has an ade-quate service life.
According to the invention, this object is achieved in that the carcass is arranged in the line of action of one of the forces present in the event of loadinq amounting between 30 and 50~ of the load rating and in that, for a proj`ecting leng-th of 5 to 20% of the tread width, the belt ends in a region -tapering on both sides of the tread width - of from 5 to 20% of the tread width.
Through the deviation of the carcass line from the ideal line as encountered in unloaded pneumatic tyres, the stress maxim1lm is dissipated so that overloading no longer has such a damaging effect, resulting in a long service life. At the same time, the new tyre shape provides for favourable tapering at the transition from the tread to the side wall, thereby reducing the danger of heat build-up and improving the flow of forces.
In addition, the transfer OL forces Erom the belt is promoted by the lateral extension of the belt inserts on Le A 21 163 ~3~3~
both sides o~ the tread.
In one particular embodiment, the tapering region is defined by concave arcs having radii of from l0 to 25~ of the tread width.
This special arcuate rounding is easy to produce from the point of view of moulding and has proved to be favourable in the event of deformation.
One example of an embodiment of the invention is described in detail in the following with reference to the accompanying drawings~ wherein:
Figure l is a section thrQush a tyre.
Figure 2 shows layers of the carcass.
In Figure l, the tyre consists o a steel cord carcass l, a highly elastic rubber mixture 2, a side wall 3, a lower steel belt 4, an upper steel belt 5 and a tread 6 which at its edge gradually merges with the side wall 3 through two concave grooves 7 having the radius R~ To emphasize the trend of the carcass line, the drawing also shows the usual carcass line of unloaded tyres of equal height which, in this case, is offset by the distance = l0 to 25 mm in the vicinity of the grooving of the carcass.
Figure 2 shows in section the lines of action of the forces applied in the event of loading amounting to 25 0, 30, 40 and 50~ of the permitted load. The desired carcass line is required in particular to follow an action phase, but should at least lie in the shaded area.
Le A 21 163
This invention relates to a pneumatic tyre for heavy loads consisting of an air-tight inner panel, a carcass, a belt, a tread, side walls and a tyre base.
It has been found that radial lorry tyres of S conventional construction are not suitable for heavy-duty operation under harsh conditions such as can occur for example in the event of excessive overloading (up to 200%) or inadequate air pressure. Ihis is because radial tyres of conventional construction are primarily designed for relatively high speeds and long motorway runs. Under harsh condit ons J tyres of this type fail after only a few thousand ~ilometres.
The object of the present invention is to provide a pneumatic tyre for heavy loads which, even in the event of adverse stressing by road surfaces, overloading ~nd poor maintenance (air pressure), still has an ade-quate service life.
According to the invention, this object is achieved in that the carcass is arranged in the line of action of one of the forces present in the event of loadinq amounting between 30 and 50~ of the load rating and in that, for a proj`ecting leng-th of 5 to 20% of the tread width, the belt ends in a region -tapering on both sides of the tread width - of from 5 to 20% of the tread width.
Through the deviation of the carcass line from the ideal line as encountered in unloaded pneumatic tyres, the stress maxim1lm is dissipated so that overloading no longer has such a damaging effect, resulting in a long service life. At the same time, the new tyre shape provides for favourable tapering at the transition from the tread to the side wall, thereby reducing the danger of heat build-up and improving the flow of forces.
In addition, the transfer OL forces Erom the belt is promoted by the lateral extension of the belt inserts on Le A 21 163 ~3~3~
both sides o~ the tread.
In one particular embodiment, the tapering region is defined by concave arcs having radii of from l0 to 25~ of the tread width.
This special arcuate rounding is easy to produce from the point of view of moulding and has proved to be favourable in the event of deformation.
One example of an embodiment of the invention is described in detail in the following with reference to the accompanying drawings~ wherein:
Figure l is a section thrQush a tyre.
Figure 2 shows layers of the carcass.
In Figure l, the tyre consists o a steel cord carcass l, a highly elastic rubber mixture 2, a side wall 3, a lower steel belt 4, an upper steel belt 5 and a tread 6 which at its edge gradually merges with the side wall 3 through two concave grooves 7 having the radius R~ To emphasize the trend of the carcass line, the drawing also shows the usual carcass line of unloaded tyres of equal height which, in this case, is offset by the distance = l0 to 25 mm in the vicinity of the grooving of the carcass.
Figure 2 shows in section the lines of action of the forces applied in the event of loading amounting to 25 0, 30, 40 and 50~ of the permitted load. The desired carcass line is required in particular to follow an action phase, but should at least lie in the shaded area.
Le A 21 163
Claims (2)
1. A pneumatic tyre for heavy loads consisting of an air-tight inner panel, a carcass, a belt, a tread, side walls and a tyre base, characterised in that the carcass is arranged in the line of action of one of the forces present in the event of loading amounting between 30 and 50 % of the load rating and in that, for a projecting length of 5 to 20% of the tread width, the belt ends in a region - tapering on both sides of the tread width - of from 5 to 20% of the tread width.
.
.
2. A pneumatic tyre as claimed in claim 1, ` characterised in that the tapering region is defined by concave arcs having radii of 10 to 25% of the tread width.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813132310 DE3132310A1 (en) | 1981-08-17 | 1981-08-17 | TIRE FOR HEAVY LOAD |
| DEP3132310.3 | 1981-08-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1183438A true CA1183438A (en) | 1985-03-05 |
Family
ID=6139392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000409420A Expired CA1183438A (en) | 1981-08-17 | 1982-08-13 | Pneumatic tyre for heavy loads |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0072500B1 (en) |
| JP (1) | JPS5839503A (en) |
| AT (1) | ATE24864T1 (en) |
| CA (1) | CA1183438A (en) |
| DE (2) | DE3132310A1 (en) |
| ES (1) | ES275236Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6941990B2 (en) * | 2002-12-17 | 2005-09-13 | The Goodyear Tire & Rubber Company | Off-road tires having sidewall anti-puncture pads |
| CN103889741A (en) * | 2011-11-14 | 2014-06-25 | 株式会社普利司通 | Pneumatic radial tire for heavy loads |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3313535A1 (en) * | 1983-04-14 | 1984-10-25 | Continental Gummi-Werke Ag, 3000 Hannover | VEHICLE TIRES |
| DE3430501A1 (en) * | 1984-08-18 | 1986-03-13 | Continental Gummi-Werke Ag, 3000 Hannover | VEHICLE TIRES |
| DE3430500A1 (en) * | 1984-08-18 | 1986-02-27 | Continental Gummi-Werke Ag, 3000 Hannover | VEHICLE WHEEL |
| EP0192910B2 (en) * | 1985-02-26 | 1993-08-25 | The Goodyear Tire & Rubber Company | A pneumatic tire |
| JPH0775922B2 (en) * | 1985-03-01 | 1995-08-16 | 住友ゴム工業株式会社 | Radial tire |
| JPH01145206A (en) * | 1987-11-30 | 1989-06-07 | Sumitomo Rubber Ind Ltd | Pneumatic tyre |
| JPH02286404A (en) * | 1989-04-26 | 1990-11-26 | Toyo Tire & Rubber Co Ltd | Radial tire |
| JPH045109A (en) * | 1990-04-20 | 1992-01-09 | Toyo Tire & Rubber Co Ltd | Large-sized radial tire |
| JP2887172B2 (en) * | 1990-12-19 | 1999-04-26 | 株式会社ブリヂストン | Pneumatic tire |
| JP2613996B2 (en) * | 1992-04-23 | 1997-05-28 | 住友ゴム工業株式会社 | Pneumatic radial tire |
| EP0791486B1 (en) * | 1995-09-08 | 2003-07-09 | Bridgestone Corporation | Pneumatic radial tire |
| JP3389488B2 (en) * | 1998-02-10 | 2003-03-24 | 住友ゴム工業株式会社 | Radial tires for heavy loads |
| FR2775219B1 (en) * | 1998-02-20 | 2000-03-31 | Michelin & Cie | JOINING A TREAD BELT WITH THE SIDES OF A TIRE |
| FR2792877A1 (en) * | 1999-04-29 | 2000-11-03 | Michelin Soc Tech | TIRE PROVIDED WITH PROTUBERANCE FOR DEVITING SIDE PROJECTIONS |
| DE602007011184D1 (en) * | 2006-10-31 | 2011-01-27 | Kumho Tire Co Inc | Radial pneumatic tire with water guide rib |
| JP2009083769A (en) * | 2007-10-02 | 2009-04-23 | Bridgestone Corp | Pneumatic tire |
| EP2574478B1 (en) * | 2010-05-20 | 2016-07-27 | Bridgestone Corporation | Heavy duty tire |
| EP2676812B1 (en) | 2011-02-14 | 2017-08-30 | Bridgestone Corporation | Pneumatic tire |
| PL3358060T3 (en) | 2015-09-29 | 2021-12-20 | Nitto Denko Corporation | Layered article |
| JP6759903B2 (en) * | 2016-09-09 | 2020-09-23 | 住友ゴム工業株式会社 | Heavy load tires |
| CN107053963A (en) * | 2017-05-19 | 2017-08-18 | 江苏通用科技股份有限公司 | Kerbing rib contour structure for heavy load radial tire |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1407685A (en) * | 1964-05-27 | 1965-08-06 | Pneumatiques, Caoutchouc Manufacture Et Plastiques Kleber Colombes | Tire casing |
| FR2178802B2 (en) * | 1972-04-07 | 1974-08-02 | Uniroyal | |
| US3961657A (en) * | 1974-05-03 | 1976-06-08 | The Goodyear Tire & Rubber Company | High speed radial ply tire |
| JPS5243204A (en) * | 1975-10-02 | 1977-04-05 | Bridgestone Corp | Flat air radial tire for heavy vehicle |
| JPS5245964A (en) * | 1975-10-09 | 1977-04-12 | Meisho Kk | Grouting management method by weight recording of cement or other mixt ure |
| JPS5323562A (en) * | 1976-08-17 | 1978-03-04 | Nec Corp | Semiconductor device |
| DE2715734A1 (en) * | 1977-04-07 | 1978-10-19 | Uniroyal Ag | HEAVY-DUTY VEHICLE TIRES, IN PARTICULAR TUBELESS TIRES FOR TRUCKS OR DGL. |
-
1981
- 1981-08-17 DE DE19813132310 patent/DE3132310A1/en not_active Withdrawn
-
1982
- 1982-08-05 EP EP82107069A patent/EP0072500B1/en not_active Expired
- 1982-08-05 AT AT82107069T patent/ATE24864T1/en not_active IP Right Cessation
- 1982-08-05 DE DE8282107069T patent/DE3275072D1/en not_active Expired
- 1982-08-13 JP JP57139985A patent/JPS5839503A/en active Pending
- 1982-08-13 CA CA000409420A patent/CA1183438A/en not_active Expired
- 1982-08-16 ES ES1982275236U patent/ES275236Y/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6941990B2 (en) * | 2002-12-17 | 2005-09-13 | The Goodyear Tire & Rubber Company | Off-road tires having sidewall anti-puncture pads |
| CN103889741A (en) * | 2011-11-14 | 2014-06-25 | 株式会社普利司通 | Pneumatic radial tire for heavy loads |
| EP2781368A4 (en) * | 2011-11-14 | 2015-09-09 | Bridgestone Corp | Pneumatic radial tire for heavy loads |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0072500A2 (en) | 1983-02-23 |
| DE3132310A1 (en) | 1983-03-03 |
| EP0072500A3 (en) | 1983-08-24 |
| ATE24864T1 (en) | 1987-01-15 |
| ES275236U (en) | 1984-04-16 |
| ES275236Y (en) | 1984-12-01 |
| JPS5839503A (en) | 1983-03-08 |
| DE3275072D1 (en) | 1987-02-19 |
| EP0072500B1 (en) | 1987-01-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |